Using UHF band to avert interference frequency. Antenna diversity receiver, clear the dead spot in working distance. Splendid LCD display, shows the RF level, AF level, channel and frequency Automatic frequency scan feature searches for available frequencies. PLL system. Preset 99 non-interfered channels. The receiver support DC power supply or AA (1.5V *4) batteries. SMT technology, guarantees stable function. The transmitter equipped with lithium battery inside, it can continuously use 9 hours. The transmitter can also recharge from the receiver. INTRODUCTION: MAIN FEATURES: 2 avalaible models: - MW 900/1 with receiver and instrument trransmitter MWI 9 - MW 900/2 with receiver and head microphone MWS 99