1. Invisibly connects with any TV, VCR, VCD, DVD or audio system.
2. Two selection for surround sound and stereo sound.
3. Operation distance: up to 15m with latest infrared wireless technology.
4. Auto mute for headphone and built-in 40mm mylar speaker.
5. The transmitter has dynamic LED display for input audio level.
6. Active noise reduction system for crystal clear sound.
7. Several headphones can be used simultaneously with one transmitter.
1. Carrier frequency: (1) L channel: 2.3MHz. (2) R channel: 2.8MHz. 2. Signal-to-noise ratio(SNR): >75dB. 3. Channel separation: >35dB. 4. Distortion: <1%. 5. Frequency response: 30 - 20,000Hz. 6. Power supply of transmitter: DC 12V 150mAh. 7. Power supply of headphone: 2 x AAA.