Wireless karaoke system/ wireless microphone system/ uhf wireless mic Bl-1004 uhf handheld wireless system (with plastic case) Scope of application: hight-class ktv, high-level performance & presentation, stages, big & small parties. -selling points: 1. Uhf fixed frequency 2. Customerized uhf wireless microphone Solution 1: with wireless microphone Solution 2: with body pack transmitter and headset microphone / lapel microphone 3. Frequency: 420-560mhz, transmitting distance: 70-100m, transmitter battery 8hour 4. The antenna can be changed to black plastic antenna. Specifications: Fixed receiver: Power supply voltage: ac220v/45-60hz Power consumption: 5water Snr: > 90db False interference ratio: > 80db Adjacent channel interference ratio: > 80db Receiver sensitivity: > 5dbu (sinad = 20db) To add: 50us Handheld microphone: Transmit power: 20mw Modulation: fm, f3f Maximum modulation: ± 25khz High-order harmonic: less than over the main porgy quasi-40db Power supply voltage: 9v Continuous use of time: 6 hours Comprehensive performance: Carrier frequency: uhf420-560mhz Frequency stability: 90db Harmonic distortion: