Versatile Mini Stereo Amplifier - Bluetooth 5.0/FM/MIC Input with USB Music Play

Audio output: raw cable speaker jacks. Audio input: Bluetooth/USB(U-disk) / stereo RCA / 3.5mm AUX /MIC/FM radio. 1 S-288 Amplifier. Speaker impedance: 4-8Ω. Number of channel: 4.0 (also support 2.0/2.1/4.1).

eBay