2-channel digital power amplifier adopts BT 5.0 stable transmission and brings lossless sound quality for you. It supports U-disk and TF card playback and can be connected to the mainstream smart devices such as PC, laptop, smart phone, tablet, CD player, music player, TV, set top box and so on. Compact and lightweight, easy to carry.Features:Digital Power Amplifier: Lossless sound quality, BT 5.0 transmission, stable signal and 12m long transmission distance without obstacles.Drive-free, plug and play. It can be connected to PC, laptop, smart phone, tablet, CD player, music player, TV, set top box, etc.Supports U-disk and TF card playing, compatible with various formats (MP3/ MAV/ APE/ FLAC). Compact and lightweight, easy to carry.Adopts MA12070 chip, the real output power can reach up to 50W for each channel, 2 channels in total; equipped with 12V 5A power adapter, the output power is 30W x 2 (4 ohms); if connecting with 8 ohms speaker, the output power is 15W x 2; please noted the required voltage is DC 9V-20V, the chip will be damaged if exceeding 20V.It is a constant resistance amplifier, supporting 4/ 6/ 8/ 16 ohms passive speakers; cannot be connected to active speakers and passive subwoofer; 4 pillars in the back are output interfaces, which cannot be connected to 3.5mm headphone plug or lotus plug.Note:1. Power amplifier and power adapter included only, other accessories are NOT included.2. Size and color may be slightly different due to manual measurement and different light conditions. Thanks for understanding.Specifications:Color: Black/ Silver/ Wood Color (Optional)Plug: US/ EU (Optional)Case Material: ABSType: 2.0 StereoOutput Power: 50W + 50WRequired Voltage: DC 9V-20VBT Protocol: 5.0BT Distance: 12m (without obstacles)Audio Input: 3.5mm Stereo Input, RCA Stereo Input, TF Card, U-disk, USB Audio Input (PC/ Smartphone/ Tablet/ OTG)Item Size: 10 * 6 * 5cm / 3.94 * 2.36 * 1.97inPackage Size: 15 * 14 * 6cm / 5.91 * 5.51 * 2.36inPackage Weight: 650g / 1.43lbsPackage List:1 * Power Amplifier1 * Power Adapter