Dual TPA3255 Bluetooth 5.0 Subwoofer Amplifier QCC3034 Stereo HIFI Class D Digital Power Amplifier in Case  Qualcomm QCC3034 Bluetooth 5.0 version: supports sbc, aac, aptx, aptx-HD decoding  Input mode: analog and Bluetooth input mode. When the two methods are input at the same time, the Bluetooth input has priority. After the Bluetooth is connected, the RCA input is automatically disconnected; when the analog input is required, please turn off the Bluetooth function of the mobile phone to switch.    Product name: D3 TPA3255 2.1 Bluetooth 5.0 digital power amplifier  Working voltage: DC24-48V  Net weight: about 0.7KG (without packaging)  Frequency response: 20Hz-20KHz  colour:Black  Material:Aluminum alloy  size:175 x 125 x 40MM    Package Contents:  1 x Bluetooth 5.0 Amplifier    Only the above package content, other products are not included.  Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.