Rack-mounted 2U alloy panel,TCP/IP high quality digital audio transmission.Built in 50W stereo power amplifier,rated voltage,rated impedance outputs,2 audio outputs, 1 audio signal outputs,2 mic inputs.blackout of external power amplifier. Restart time:less than 3seconds, Power::~220V/50Hz.Output: rated voltage 100V,70V;rated impedance 4~16Ω,network interface:standard RJ45supports ICP/IP,UDPIGMP protocol(multicast). Audio format:MP3 MP2. Sample:8K~48KHZ.Transmission speed:100Mbps. .Audio module:stereo,CD acoustic. Protection: overload,over temperature,short circuit.Built in power to control amplifier. Audio broadcast amplifier under 1000W is acceptable, time turn on / off the audio broadcast amplifier.