DSI Hearing Assist Blog

Comfort Duett Personal Listener

Not quite ready for a hearing aid, but having a hard time communicating in noisy situations or one-on one? Do you have a hearing aid, but it’s just not enough in some situations?

Comfort Duett is a small, easy-to-use, rechargeable, personal assistive listening device with superior sound. Use it with earphones in place of a hearing aid, or with an induction neckloop (not included), to amplify conversations and sounds from a variety of sources like the TV, radio, telephone, etc. Two year warranty. Six month warranty on accessories.

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Small, Lightweight, User Friendly
The Comfort Duett is discreet – resembling a small MP3 player – stylish, and the perfect solution for many situations. It amplifies speech, conversations and sounds from a variety of sources, like the TV, radio, telephone, etc. The innovative base unit functions as an overnight charger and as an interface to audio equipment like the TV and telephone. The headphones can be placed on the hanger attached to the base unit.

Superior Sound
Comfort Duett has superior sound quality, operating in the 275 to 9000 Hz bandwidth for powerful, up to 60dB amplification with maximum volume gain and bass reduction controls. Nothing is this versatile. It is the perfect communication tool for those who are hard of hearing.

With a switch of the setting, the Comfort Duett goes from being an acoustic amplifier to an induction receiver, able to pick up the signals from a loop system. It can operate on a fully-charged battery for approximately 15-20 hours depending on volume level.

The Comfort Duett can be equipped to amplify sound from external sources with the addition of the TV Kit and Telephone Kit.

TV Amplification: The TV kit’s cable connects to the base unit, not the communicator. Placed in the base, the Comfort Duett amplifies the audio source. When lifted out of the base, it automatically switches to communicator mode.

Telephone Amplification: The telephone kit connects a stationary phone to the base unit, amplifying the sound from the telephone when the communicator is placed in the base unit.

Connecting the accessories to the base unit leaves the communicator free of extra wires. When lifted out of the base, the Comfort Duett automatically switches modes without changing position of the function button.


  • Functions as a t-coil induction receiver; can be used by people with t-coil hearing aids

  • Ideal for small groups, communicating one-on-one and in autos

  • Perfect for hearing aid users with and without a t-coil

  • Up to 60dB amplification

  • Add-on kits available for TV and telephone listening that connect to the base unit, not the Duett, so the wearer is free to move around

  • Compatible with neckloop, headphone/earphone and t-coil

  • Charger unit holds the Comfort Duett and charges it at the same time

  • Large function button, distinct indications and ergonomically-designed volume control

  • Approximately 3 x 1.5 x 1 inches (85mm x 37mm x 30mm)

  • Lightweight (50g/1.7oz.)


  • Headphone and earbud (neckloop available sold separately to use with t-coil hearing aids)

  • 1 Base charger unit

  • AAA NiMH rechargeable battery

  • Headphone rest stand


Fanstel ST250 Amplified Speaker Business 2-Line Phone

The Fanstel ST250 Amplified Speaker Business 2-Line Phone  is a sophisticated 2-line amplified business speakerphone that can digitally adjust frequency- specific volume levels so that any user, especially those working in extremely noisy environments, can comfortably and clearly hear a callers voice.


It boasts highly flexible sound settings: incoming voices may be amplified by up to 52 dB with extra amplification for high frequencies. This level of amplification has been tuned to more effectively restore the perception of many phonemic distinctions common in speech than competing models. Your colleagues wont know you have hearing loss. This phone looks exactly like a normal business phone, when you increase volume it adds frequency-specific amplification automatically.

The internal acoustic chamber also restores low-frequency components in the incoming voice signal, allowing the speakerphone to deliver a crisp acoustic experience one would have only expected from a high-end conference speakerphone.

The huge 7.4 square inch display allows a user to read the screen comfortably even from a distance. This phone also features a quick and easy way for busy user to stay in touch even out of the office. With a touch of a button, incoming calls can be set to be forwarded to a mobile phone (needs call forwarding service).

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Telephone Features:

Conference grade speakerphone, up to 83 dB SPL at 500mm (~20 inches).
Up to 52 dB amplification at 120 dBSPL
Frequency-specific amplification for both handset and headset.
Auto-select the best amplification level
RJ22 and 2.5mm headset ports
Headset button with LED indicator
Redial memory of up to 32 digits
99 names/numbers directory
Name search in directory
Dial from Caller ID log or directory
4 programmable memory buttons.
One Touch Call Forwarding
Edit telephone number before dialing
Speakerphone and mute LED indicator.
Make or receive phone call without power.
Memory retention without power.
Hearing aid compatible


Caller ID and LCD Display:

99 name/number Caller ID log.
Caller waiting ID, voice mail waiting on both lines 1 and 2
Ultra large fonts on high contrast LCD.
Backlit LCD with adjustable viewing angle
LCD viewing area: 7.4 square inches

Hearing Assist Watches

Here at DS International we carry a wide array of vibrating watches designed specifically for the deaf and hard of hearing. Keep yourself on schedule by setting timers for meetings, events, medications, ect.


Take a look at our selection

Introducing the Falcon™ Keyboard

Natural typing position. No stretching or cramping. The falcon keyboard is only 1 cm (0.4 in) high allowing the wrists of the operator to be anchored to the surface of the keyboard support.

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  • The falcon™ is a multi-platform keyboard. It is compatible with any Bluetooth capable tablet, smart phone, laptop, or desktop computer.

  • The falcon™ provides a keyboard with a thumb-controlled cursor on the space bar, and cursor activation keys under the finger tips of the computer operator’s hands.

  • Efficiency is increased as the need to move at least one hand back and forth from the computer keyboard to a standard mouse, track-ball, or track pad to make cursor control operations occur is eliminated.

  • While the laptop cursor pad, keyboard track ball, or even the wrist-rest track-bar, allows the operator’s hands to remain near the keys during cursor movement, their thumb or finger operation still takes fingers away from being directly over the keyboard keys and space bar.

  • Getting used to using the falcon™ is almost natural since the thumb and fingers are in a very similar position as when using a mouse.

  • One or two movements with either the left or right edge of the thumb can take the cursor from side-to-side, or top to bottom of the monitor screen.

  • The keyboard can be set for either left or right hand operation. The hands are placed on the keyboard in a natural typing position.

  • The tips of the fingers are used to click the left/right or up/down scroll white keys. Zoom and rotate movements are also provided.

  • The size of the falcon™ is very similar to a laptop inserted keyboard with full size keys. It has a silicon membrane top and bottom and USB port seal to provide protection from water spills, dust, and other objects.

  • An initial patent, Serial Number 12/392,919 was filed in February 25, 2009 and then replaced with a patent continuation, Serial Number 13/507,667 filed 7/18/2012 pending.

NU-VOIS III Digital Artificial Larynx Speech Aid

The NU-VOIS III Digital Artificial Larynx Speech Aid is an electro-larynge speech aid with state-of-the-art electronics. A programmable electronic circuit allows for full digital control of all functions. The unit features volume and tone/pitch buttons for easy adjustability, allowing the user to add inflection to their speaking voice for emphasis and a more natural sounding voice.

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  • Dual control buttons each independently adjustable for volume and tone without disassembly. Dual volume buttons sweep volume smoothly up or down.

  • Both dual tone inflection and easy external setting.

  • Can be used with an oral adapter – included in the Complete Kit.

  • High impact plastic housing.

  • Weighs, 4.5 oz, 4.4″ long, and 1.3″ diameter.

  • The complete kit comes with a Nu-Vois III speech aid, two rechargeable 9 volt NMH batteries, battery charger, oral adapter & tubes, and Use and Care guide.

  • Brand new in box with five year manufacturer warranty.

Clarity AlertMaster AL10 and AL12 Combo Visual Alert System

The AlertMaster AL10™ Visual Alert System monitors its environment, telephone, doorbell, various sounds, and motion within its environment, providing visual notification of activity.  It is an ideal solution for the deaf, hard of hearing, or anyone in a noisy environment.  It features an alarm clock, large 3.5” display, security light control, lamp flasher and vibrating alert.  It is easy to use and easy to see because of the simplified design, hassle-free installation and large backlit icons.

The AL12™ Add-On Visual Alert System can be placed in a separate location to provide additional notification when paired with the AL10™ or the AL11™.  It is easy to use and easy to see because of the simplified design, hassle-free installation and large backlit icons.

One (1) year limited manufacturer warranty

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Stay Connected

  • Sensors monitor the door bell and knocks on the door to alert you of visitors

  • Alarm clock with snooze and vibrating alert features to wake the deepest of sleepers

  • Monitors the specific sounds made by babies or young children

Stay Secure

  • The audio alarm monitor will notify you of any loud and unusual sounds.

  • The motion detector will monitor a large area and notify you of any unexpected movement

  • The security light control can be set to turn on or off lighting around the home at selected times

Easy to Use

  • Various accessories allow you to customize the system for your specific household or lifestyle needs

  • Large, brightly lit icons and lights are sized and positioned for optimum visibility from all sides

  • Simple set up – no hard-wiring required, just plug it in

  • Flashes a connected lamp with a built in lamp flasher for added notification

  • A powerful vibrating alert shakes your bed or pillow to alert you when asleep

  • Distinct flashing patterns and backlit icons on unit help you distinguish between events

  • Large, lit button to easily turn nearby lighting On or Off

  • Large 3.5” clock display (measured diagonal)

  • Compatible with existing/previous AlertMaster base units and accessories

Superior Technology

  • Adjustable display brightness

  • Expand the AlertMaster system to accommodate larger buildings or multiple locations using one or more AMRX2 remote receivers (optional)

  • Dual Power Backup keeps the system running when the power is out

  • Send and receives pages from personal signalers (optional)

  • Optional Accessories:

AMAX – Audio Alarm

AMBX – Baby Monitor
AMDX – Door Announcer
AMPX/AMPXB – Personal Signalers
AMSX – Motion Sensor
AL12 – Remote Receiver

Sonic Alert Sonic Bomb SBB500ss Alarm Clock w/ Bed Shaker

The Sonic Bomb SBB500ss AKA “The Bomb”, makes a great Christmas gift not only for the hard of hearing but for the heavy sleeper as well.

Stealth grey color with red controls, night vision display and pulsating alert lights wont keep you in the dark. Complete with ground shaking super-charged bed shaker, and turbo-charged 113db extra loud alarm. Good luck sleeping through this blast Batman…

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  • Packaged with our most powerful 12-volt bed shaker.

  • Pulsating flashing alert lights.

  • Hi/low dimmer switch for better night vision.

  • Extra loud audio alarm, loud 113db adjustable tone & volume control.

  • The Bombs got your back with Battery backup, maintains time and alarm setting in the event of power failure.

  • Dual Time feature.

  • Dual Power featuring: The Bomb comes with a 110 volt power supply, also will work with an optional 220 volt transformer.

  • 1 Year Sonic Alert blast proof warranty.