ITEM NAME:XH-M312 M312 TPA3118 TPA3118D2 DC 12V 24V 28V 3A Output 45W X 2 Digital HD H3W1 XH-M312 M312 TPA3118 TPA3118D2 DC 12V 24V 28V 3A Output 45W X 2 Digital HD H3W1 This is an audio power amplifier board that strengthens low-power, inaudible electronic 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 audible to listeners. It is the final electronic stage in a typical audio playback chain before the signal is sent to the loudspeakers and speaker enclosures. Maximum Power Per Channel:45W*2 Power supply voltage:DC12-28V(24V best) AUX input:3.5mm earphone seat Input Current:3A Output impedance:4-8Ω input impedance:1KΩ Signal to noise ratio:100db Size:66*53mm Power interface:5.5*2.1 Chip type:[TPA3118D2]*1 Net weight:37g color: blue Material: metal + PC Package Contents: 1*Audio Low Power Amplifier Board Module