1. Auto power on/ off function.
2. Effective range: more than 50 meters.
1. System: UHF/ RF. 2. Carrier frequency: (1) For Europe: 863.5, 864.5MHz. (2) For USA: 914, 915MHz. 3. S/N ratio: >75dB. 4. Effective range: more than 50 meters. 5. Mode: stereo. 6. Distortion: <1%. 7. Frequency response: 30 - 20,000Hz. 8. Power requirement: DC 12V 150mA.