1. Double PLL system for ultimate frequency stability.
2. Operation distance: up to 100m with latest UHF/ RF wireless technology.
3. Active noise reduction system for crystal clear sound (S/N ratio: >75dB).
4. Auto mute and auto tuning functions are available for headphone.
5. Several headphones can be used simultaneously with one transmitter.
1. Carrier frequency: (1) For Europe: 863.5, 864 and 864.5MHz. (2) For USA: 914, 914.5 and 915MHz. 2. Frequency response: 30 to 20,000Hz. 3. Channel separation: >35dB. 4. Distortion: <1%. 5. Power supply of transmitter: 12V DC/ 150mA. 6. Power supply of headphone: 2 x AAA batteries.