ITEM NAME:1 pcs blue backplane ABS + metal monaural 100W digital amplifier board TPA3 K5D5 1 pcs blue backplane ABS + metal monaural 100W digital amplifier board TPA3 K5D5 color: blue Material: metal ABS Noise-Signal Ratio: 100 db Channel: Single Channel Short Circuit Protection: Yes Overheating Protection: YesOver Voltage Protection: Yes 1.Capacitance with pulse intensity, high reliability, good self-healing. 2.Run efficient class D, both Greater than 90% of the power efficiency and low idle loss characteristics. XH-M542 Mono 100W Digital Power Amplifier Model: XH-M542 Chip Type: TPA3116D2 Supply Voltage: DC 12V~26V Output Power: 100 W Package Included: 1 x Amplifier Board Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.