Warm tips: 1. For safer shipping and delivery, the remote control may not include battery(2*AAA), please preapre by yourself. 2. USB interface only supports 16 Bit/44.1KHz sampling rate, over the range please use Bluetooth input. Features Multiple audio inputs for different purposes: With standard RCA and wireless FM radio and Bluetooth 5.0 input, can be used as a Bluetooth receiver, with strong compatibility, can work well with mobile phone, MP3, tablet, computer, CD player etc. With SD card / U-disk / mobile hard disk inputs, can be used as a digital player, besides MP3 also supports WMA, APE, FLAC, WAV(DTS) etc. lossless formats. USB interface can connect to computer as a USB DAC, no need for any driver, plug and play, very convenient to get high resolution music. Super large output power and HiFi sound: adopting classic TDA7498E amp chip whose max output can reach 160W+160W (4Ω load), optional 19V/4.74A power adapter, easily to drive most home bookshelf/ computer/ desktop /floor-standing passive speakers. The sound is clear with low distortion, no pop or audible noise even at high power output. Addtional 3.5mm output and EQ effect: specially designed 3.5mm jack output that can drive 16-300Ω headphones, also can connect another amplifier and active speakers/subwoofers to build 2.1 audio system. Adding 5 kinds of EQ effects(normal, rock, pop, classical, jazz, country.) to get music with different styles. Proper size and considerate design: with LED display to clearly show the working status in real time, remote control makes all operations more easier, and aluminum case make it more fashionable and powerful, very suitable for home and desktop audio system use. Parameters Audio input: Bluetooth / USB / SD card / RCA / FM Radio Audio output: banana speaker jacks / 3.5mm output jack Bluetooth version: 5.0 Max storage capacity of U-disk / SD card: 256G Max storage capacity of Mobile hard disk: 2TB Supported formats of U-disk/ SD / hard disk: APE/FLAC/WAV(DTS)/WMA/MP3 (16 bit 44.1KHz) Max output power: 160W*2 Output power: 100W*2@4Ω / 50W*2@8Ω (under DC 24V) Matched speaker impedance: 4Ω/ 8Ω Mathched headphone impedance: 16-300Ω Frequency response: 20Hz-20KHz THD: 0.01% SNR: 95dB Opreation mode: button+remote control+app control Working voltage: DC 12-32V (5.5mm/2.5mm) Dimensions(W*D*H): 135*92*45mm / 5.31*3.62*1.77in Net weight: 350g / 0.77lb Package weight: 760g / 1.68lb Packing List 1*L8 Amplifier 1*19V Power Supply 1*Remote Control 1*Bluetooth Antenna 1*FM Antenna