Monitoring System, Metal Case (Transmitter and Receiver), 42 MHx Bandwidth: 1680 Switchable Frequencies, Enhanced Channel Bank System with up to 16 Supported Frequencies, Ethernet Port for Wireless Systems Manager (WSM) Software, Pilot Tone Squelch for eliminate RF interference, automatic frequency scanning, widest range of audio sensitivity, easy menu operation, illuminated graphic display, auto lock function, HDX expander for crystal clear sound, MUTE function on transmitter, 16 presets, frequency response: 25 – 15,000 Hz, THD: 90 dB (A), frequency range: 516…865 MHz, output power: 10/30 mW, transmit and receive frequencies: 1680, bandwidth change: 42 MHz, operating time: 4 – 6 hours, includes 1x SR 300 G3 stereo transmitter, 1x EK 300 G3 diversity stereo receiver, 1x IE 4 headphones, 1x GA 3 rack mount system, 1x NT 2 power supply unit, 1x antenna, 2x AA batteries and instructive.