With 3.5mm AUX/USB/Bluetooth 5.0 Audio Input. Compatible with almost all home audio devices, for example, mobile phones, tablets, computers, TVs, boxes, CD players, etc. Bluetooth 5.0 amp. Classic TPA3116 chip supports Bluetooth 5.0 to realize fast and high-capacity transmission and a greater wireless range. Adopts TPA3116 chip whose max output power reaches 50W x2, easily driving most home desktop/bookshelf/passive indoor speakers (4-16Ω). Audio inputs: Bluetooth / USB / 3.5mm AUX Audio output: banana speaker jack Bluetooth: 5.0 Version Max output Power: 50W*2 (24V/4Ω load) Speaker Impedance: 4Ω-16Ω Working voltage: DC 9V-24V (more than 3A) Panel specification: 55mm / 2.17in Frequency Response: 20Hz-20KHz (±1dB) SNR: ≥98dB Dimensions (H*L*W): 60*40*55mm / 2.36*1.57*2.17in Notice: 1. Bluetooth Input: Must disconnect Aux and USB cable, otherwise you can't find the Bluetooth. 2. Inserting an Audio Cable will switch to Aux mode; Bluetooth stops working. 3. The Type-C is a USB sound card Input. Connect to a computer to realize computer external sound card playback. Type-C Audio Input: Can connect to a computer or smartphone. Needs no driver, but doesn't support OTG. Package includes: Digital amplifier x1 Manual x1 Please note: This price does not include a power supply. If you need one, please purchase it separately.