4Ω 3W Bluetooth Power Amplifier 3.7V Li Battery Charging Module Micro USB/Type-C

USB Micro / Type-C 4Ω 3W Mono Bluetooth Power Amplifier Circuit board 3.7V

TWS Stereo Bluetooth Amplifier Board 2*10W 2Channel DC5V or 3.7V Battery Powered

DC3.5V-5V 10W Type-C Bluetooth Mono Audio Amplifier Decoder Board TWS 3.5mm DIY

DC5V TWS Bluetooth Power amplifier module 2*10W Dual Channel Bass Amp Board

ZK-502T Bluetooth Dual-channel Stereo Audio Power Amplifier Module TPA3116 50W*2