Description:Thisis an audio power amplifier board that strengthens lowpower, inaudibleelectronic audio signals such as the signal from radio receiver or electric guitar pickup to a level that is strong enough for driving loudspeakers or headphones. Power amplifiers make the signal audibleto listeners. It is the final electronic stage in a typical audio playback chain before the signal is sent to the loudspeakers and speakerenclosures.Features:The amplifier chip supports short circuit protection, overheating protection, over voltage protection, under voltage protection and DC fault protection.Large capacity capacitance is soldered with PCB board without possibility of causing a short circuit.1.6mm thick PCB board is beautifully and well designed, and there is only a small quantity of soldering joints on the back.Comes with a special designed black heat sink which ensures a better heat dissipation.Make sure the positive and negative poleof power supply is connected correctly anddo not use small power loudspeaker.Specifications:Chip: TPA3116D2Input Voltage: DC1226VMaximum Output Power: 120W x 2SNR: 100dbChannel: Dual channel Size: 92 x 68 x 16mm or 3.62 x 2.67 x 0.63"Package Includes:1 x Power Amplifier BoardNote:1. New-style and old-style are shipped randomly.2. The contact parts on the product are in patch or in-line form, and both versions are shipped randomly..