Video of RWM50U: Includes : 1 wireless handheld microphone 1 receiver unit User manual batteries Power adapter Features: Rockville RWM50U UHF Wireless HandHeld Microphone System Rugged metal housing Professional receiver with a multifunction color display shows frequency, signal synch, and audio input High performance wireless microphone system Includes transmitter with one hand held, high sensitivity, unidirectional, wireless cardioid microphone High sensitivity, unidirectional, wireless cardioid microphone Featuring a dual filter design to limit feedback and interference Ultra signal stability eliminates unwanted distortion Transmitter automatically links to receiver for ease of use Comfortable ergonomic composite microphone construction Low power consumption for longer battery life System : Operating Range : 300´ – 400´(indoor), 250´ – 350´(outdoor) Channel : One Channel Frequency Range : 520MHz - 590MHz Frequency Stability : ±0.005% Modulation Mode : UHF Frequency Response : 50Hz - 15KHz (±3 dB) Dynamic Range : 105dB S/N: 100dB T.H.D : < 0.5% (1KHz) Audio Output Jack : XLR balanced & 1/4 mixed Power Supply: 110V Operating Temperature : 3°F - 130°F Mic Battery Operating Time: up to 10 hours Oscillation mode : Quartz Crystal RF Output Power : 10mW Output Level : 0 – 300mV