ITEM NAME:DC ±20-28V 68W LM3886TF HIFI power amplifier board PCB parallel bare board M&E Blue board using double-sided circuit boards, wiring reasonable, very nice amp. Mono Power Amplifier Module Product Model:LM3886TF Operating Voltage:AC 20V~28V Output Power: 60W Resistance:1% copper foot metal film Size:61mm x 37mm, Can monolithic or used in parallel Included: 1PCS x Digital Amplifier Bare Board.Product Model:LM3886TF. 1PCS x Digital Amplifier Bare Board. Mono Power Amplifier Module. Can monolithic or used in parallel.