http://www.humantechnik.com/en/products/tvaudio-listening-systems/introson-24/
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introson 2.4

 

Digital TV listening system with 2.4 GHz transmission – now with TOSLINK

With an adjustable volume up to 120 dB, »introson 2.4« will charm you with its exceptionally clear audio reproduction and its differentiated high-quality sound - reliable and free of noise. This is ensured by the 2.4 GHz frequency, which permits wireless transmission of high bit rates without compression.

3 different equalizer presets are available at the push of a single button.

A special feature of the introson 2.4 is the possibilty to switch from the reception of the TV sound to communication. In this case, the receiver picks up the environment's sounds with its inbuilt microphone and amplifies them. This makes it possible to mute the TV sound in the receiver and converse with other people in the room at any time.

Specifications

Transmission method: digital FM (Stereo)
Carrier frequency: 2,4 GHz
Frequency response: 30 - 20000 Hz
Harmonic distorsion: < 0,5 %
Signal-to-noise ratio: > 75 dB
Working range: 0° C – 55° C
###Receiver  
Operating time per battery charge: approx. 4 h
Battery type: Rechargeable Li-Polymer 3,7V 350 mAh
Included batteries: 2
Recharge time: approx. 5 h (2,5h for 90% recharge)
Maximum volume: ca. 120 dB (A)
Weight: 66 g
###Transmitter  
Power supply: 5 Volt DC
Power supply unit: 100-240 Volt 50-60 Hz
Weight: approx. 43 g
Transmission range: up to 25 m
introson 2.4 Toslink-Set with transmitter and underchin receiver, black
Single components
Introson 2.4 undercin-receiver (1 battery included), black
Accessories
Charging case with two 5-bay-chargers for Introson 2.4-receivers
Rechargeable battery for Introson2.4
Connection lead set for Introson IR / 2.4
5-bay-charger for introson2.4
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