Ideal as a small office or workshop PA system amp in function centres, community halls, cafes and more. It is protected from accidental speaker wire shorts and if over-extended will simply shut down, and reset after it has cooled off. It has a front panel microphone input, bass and treble adjustment, as well as a master volume control. It is housed in a sturdy metal enclosure designed to take modest knocks and scratches. On the rear panel are left and right push-down tabs as output terminals (speaker connection), and a line level RCA right/left input (red and white) for stereo connections. If you need extra audio-in options we suggest the WA7016 or PA3570 double adapters. Specifications: Signal to Noise Ratio at 15W: 106dB Signal to Noise Ratio at 1W: 94dB Operating Temperature: 0-50°C Length : 170mm Width : 77mm Height : 157mm AC Plugpack Voltage : 240V Packaged Volume : 3.82l Packaged Weight : 1.77kg Packaged Length : 18cm Packaged Width : 10cm Packaged Height : 21.2cm Type of Amplifier : Stereo Number of Channels : 2ch Power Per Channel (WRMS) : 18W Nominal Impedance at Rated Power : 4Ω Frequency Response : 50Hz, 18Hz Distortion (THD) < : 0.08% Signal to Noise Ratio : 60dB