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.