Abstract: WPM-200 features with UHF frequency band and PLL frequency technology reliable performance, UHF 780-805 band, preset 6 channels for selection, low power consumption. Two alkaline batteries can work more than 30 hours. One transmitter can be equipped with multiple receivers within the effective range. It also features dynamic expansion circuit with high S/N ratio. Anti-interference circuit allows 4-6 sets to operate without interference.