Uhf wireless microphone/ wireless microphone/ wireless karaoke microphone Selling points: 1. Uhf 99 channels 2. Customerized uhf wireless microphone Solution 1: with wireless microphone Solution 2: with body pack transmitter and headset microphone / lapel microphone 3. Frequency: 670-690mhz, transmitting distance: 70-100m, transmitter battery 12 hour Model: bl-1003 mini uhf wireless microphone system Features: Receiver Power supply: ac100~240/45~60hz External dc power: 16~20v Power consumption: 5w S/n ratio: >90db; p/n ratio: >80db; f/n ratio: >80db Receiving sensitivity: 5dbu(sinad=20db) Transmitter Transmitter power: 10mw Modulation mode: fm Maximum deviation: ± 50khz High harmonics: more than 40db(with carrier) Battery voltage: aa 1.5v× 2/9v Battery life: 12 hour Power switch noise: provide with perfect switch noise deducted circuit Main function Frequency range: uhf 670-690mhzmhz Frequency stabilization: < ± 30ppm Dynamic range: >90db Total harmonic distortion: < 0.5% Frequency response: 40hz~20khz± 3db Audio outpout: separate type: 0~± 500mv Mix type: 0~± 300mv