Features 1.PROFESSIONAL DESIGN: TDA7377 digital power amplifier board module, 2x35W dual channel stereo, ideal for DIY sound equipment players. 2.INPUT, PORT PROTECTION: TDA7377 power amplifier board module's input is 3.5mm input, 3P extension input; port protection for power input reverse protection, short circuit, overcurrent, overheating. 3.POWER SUPPLY, POWER: TDA7377 power amplifier board module's power supply is DC9?18V, recommended 12V. 4?8 speakers can be connected, maximum 2x35W stereo (18V4). 4.CIRCUIT BOARD, CAPACITORS: TDA7377 power amplifier board board adopts high grade pure black sunken gold circuit board, imported for KEMET sound capacitors, dual imported for NICHICON high capacity filter capacitors for each channel. 5.FINE CRAFTED: TDA7377 digital power amplifier board module with special order pure black copper terminals, gold plated sound input terminals, customized 3P pure black terminals. specificationItem Type: TDA7377 Digital Power Amplifier Module_x000D_ Material: PCB, Metal_x000D_ Chip: TDA7377_x000D_ Power Supply: DC9-18V, Recommended 12V_x000D_ Output Power: Can Be Connected to 4-8 Speakers, Maximum 2x35W Stereo (18V4)_x000D_ Input: 3.5mm Input 3P Extension Input Port_x000D_ Protection: Power Input Reverse Connection Protection, Short Circuit, Overcurrent, Overheating PackageList1 xTDA7377DigitalPowerAmplifierModule