Board color: RedPCB board material: Flame retardant epoxy resin,Dimensions: approx. length 8cm, width 4.8cm, height 2cm Product Parameters:Audio type: TPA3116D2Input voltage: DC 5-24VOperating frequency: 20Hz-20HzOutput type: two-channel; stereo Precautions:1. The power supply is best 24V, do not exceed this voltage!2. Audio output do not short circuit to each other or short circuit to ground.3. Please carefully check and make sure wiring is correct before power-on. A full range of protection system with reverse power protection.Speaker output short circuit protection.Also with anti-shock designed switch.Switch without "POP" sound Package Content:1x DC24V TPA3116D2 Dual-Channel Stereo Power Amplifier Board