* Carrier frequency:
   a) For Europe: 863.5, 864, 864.5MHz
   b) For U.S.A: 914, 914.5, 915MHz
* Three channel selection in different frequency for transmitter
* Double PLL system for ultimate frequency stability
* Operation distance up to 100 meters
* Active noise reduction system for crystal clear sound (SNR > 75dB)
* Auto mute and auto tuning function available for headphone
* Any number headphones can be used simultaneously with one transmitter
* Built-in 30mm mylar speaker
* Frequency response: 30 - 20,000Hz
* Channel separation: > 35dB
* Distortion: < 1%
* Power supply of transmitter: DC12V 150mA
* Power supply of headphone: Requires 2xAAA (1.5V) batteries