1. Invisibly connects with any TV, VCR, VCD, DVD or audio system.
2. Operation distance: up to 10m with latest infrared wireless technology.
3. Built-in 30mm mylar speaker and auto mute for headphone.
4. Ultralight weight design for comfortable wearing.
5. Active noise reduction system for crystal clear sound.
6. 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: >75dB. 3. Channel separation: >35dB. 4. Distortion: <1%. 5. Frequency response: 30 to 20,000Hz. 6. Power supply of transmitter: 12V DC, 150mAh. 7. Power supply of headphone: 2 x AAA.