Description: Stable: 5.0 transmission, the signal is more stable and the transmission is faster, allowing you to enjoy unlimited freedom U disk: SUPPORT U disk, Can read files in most lossless formats (MP3, WAV, WMA, APE, FLAC) you can play your favorite music, with lossless sound quality, very convenient and practical. Strong Compatibility: Built in , U disk, optical fiber, coaxial, etc., can be connected to most electronic digital products on the market, such as Set Top Box, DVD, Projector, Notebook, Desktop Computer, TV etc. Power: The power amplifier adopts MA12070 chip, the actual output power can reach 68W per channel, 2 channels total 136W (20V power supply) Power amplifier output: The power amplifier is a constant resistance power amplifier, which SUPPORT passive audio/speaker of 4/6/8/16 ohms. Specification: Material: ABS plastic Size: 100 x 62 x 113mm/3.94inchx 2.44inch x 4.45inch Power amplifier type: 2.0 two channel full digital decoding power amplifier Power output: 68W+68W impedance: 4-8ohms Power: 9-20V Boot method: long press distance: 12 meters version: 5.0 Audio input: Press the M key to switch the corresponding input mode, and the screen will display the mode name 1. input 2. RCA audio double lotus hole input 3. Optical fiber input 4. Coaxial input 5. U disk input 6. USB audio input (computer USB/mobile phone, tablet OTG) Amplifier output: 2.0 stereo output (can be connected to passive speakers / car speakers / disassembled speaker speakers, etc.) Package Includes: 1 Piece Audio Power Amplifier