The Unisar DH900 TV Listening System is a wireless TV amplifier that helps people with hearing loss listen to television, movies, or music at a comfortable personal volume without turning up the room volume. The lightweight under-chin headset receives a 2.4 GHz digital radio signal from a tabletop transmitter and delivers clear, amplified sound directly to the ears.
This assistive listening device is suited for age-related hearing loss or other mild to moderate hearing difficulties. Independent volume, balance, and tone controls allow the listener to adjust loudness for each ear and shape treble response for speech clarity. Mono or stereo modes support both TV dialogue and music listening.
Features and benefits
- Wireless TV listening for people with hearing loss
- 2.4 GHz digital RF signal with up to 25-meter range in open areas
- Under-chin stethoset headset with soft earbuds
- Independent volume and left/right balance controls
- Four tone clarity settings and treble adjustment
- Mono or stereo listening modes
- Built-in microphone for amplifying room conversations
- Mute button that switches from TV audio to local conversation
- Quick-charging base with slots for main and spare batteries
- Digital hopping transmission to reduce interference
- Signal passes through walls and floors within stated range
How the system works
The DH900 system includes a transmitter base that connects to the television, DVD player, or audio source with the supplied cables. The base sends a 2.4 GHz digital audio signal to the wireless headset. A rechargeable nickel-metal hydride battery powers the headset and slides into a compartment in the under-chin receiver.
When the headset is turned on, the wearer adjusts volume, balance, and tone with the controls on the receiver until speech is clear and comfortable. Pressing the mute button silences the TV audio and activates the built-in microphone on the headset so conversations in the room are amplified instead. The transmitter base also charges the main headset battery and a spare battery in a second charging slot.
Who may benefit
The Unisar DH900 TV Listening System is intended for adults who want clearer TV or audio without raising the room volume, including those with age-related hearing loss or other mild to moderate hearing conditions. It can support users with conductive hearing loss, presbycusis, or other non-surgical hearing difficulties, under the guidance of a hearing care professional when appropriate.
What is included
- DH900 wireless TV receiver and amplifier headset with built-in microphone
- Transmitter base and charging cradle
- Two rechargeable batteries (one for use, one spare)
- Two earbuds
- AC wall power adapter
- Audio connection cables
- Adapter plug and 6.3 mm to 3.5 mm audio adapter
- User instructions
Frequently asked questions
Can others still hear the TV when the system is in use?
Yes. The television speakers can remain on so others hear the normal TV volume while the listener uses the DH900 headset at a personal level.
Can the TV volume be muted while the headset is used?
Yes. The TV volume control is separate from the DH900 volume. The TV can be turned down or muted while the listener hears sound through the headset.
Does the system have its own volume control?
Yes. Volume, balance, and tone controls are located on the headset so the listener can adjust sound without changing TV settings.
How long does it take to charge the battery?
A full charge typically takes about two to three hours. The headset signals when the battery needs to be recharged.
Does the signal interfere with phones or other household devices?
The 2.4 GHz digital hopping transmission is designed to avoid interference with common devices such as garage door openers, cell phones, and microwave ovens.
Specifications
- Manufacturer: Verseo
- Brand: Unisar
- Item Number: DH900
- Application: TV listening and personal audio amplification
- Style: Earbud under-chin stethoset headset
- Wireless: Yes
- Transmission Type: 2.4 GHz digital radio frequency, hopping system
- Range (open area): Up to 25 meters
- Frequency Response: 30 Hz to 20 kHz
- Signal-to-Noise Ratio: > 75 dB
- Total Harmonic Distortion: < 0.5%
- Listening Modes: Mono or stereo
- Controls: Volume, balance, tone clarity, treble, mute
- Power: Rechargeable battery in headset with spare battery slot in base
- Dimensions (approximate): 4 inches high x 10 inches wide x 6 inches long
- Weight (system): About 1.15 pounds
- Warranty: One-year limited warranty
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