Headphone Amplifiers descriptions： We use high-quality raw materials, all materials are very suitable for the product, please rest assured to buy. Hifi Bluetooth 5.0 Receiver, Dac Stereo , Usb Music Player, Fm Radio. Features With 6 Kinds of Audio Input (Bluetooth 5.0 / USB & U-disk / Stereo RCA / AUX / SD Card / FM Radio) and 2 Kinds of Audio Output (stereo RCA / 3.5mm Headphone Jack), Compatible with Different Audio Devices and Such As Phone, Computer, CD Player, Echo Dot and So On. Can Be Used As a Bluetooth or USB DAC, a Preamp, a Headphone Amp and a FM Radio, but Also As a Digital Music Player, Supporting Lossless Format Such As APE, FLAC, WAV, MP3, WMA, DTS Etc, Providing HiFi Listening Experience. Op Amp Circuit Adopting NE5532 Chip, with Strong Drive Power, Better Sound Quality and Warm Sound Listening. Noise Reduction Circuit is Specially Designed to Upgrade the Sound and Make No Background Noise. Mini Size and Simple Design but with Powerful Function, Blue Digital Display Looks More Attractive, Equipped with Remote Control, Very Convenient to Use. Powered by Micro-USB, It Can Be Used in the Car, Bringing Listening Pleasure During the Journey. Parameters Audio Input: Bluetooth, USB, SD Card, AUX, Stereo RCA, FM Radio Audio Output: Stereo RCA, 3.5mm Headphone Jack U-disk/SD Card Supported Format: APE, FLAC, WAV, MP3, WMA, DTS Working Voltage: DC 5V FM Band: 87.5-108MHz Power Interface: Micro-usb Chassis Material: Aluminum Alloy Dimensions(W*L*H): 92*108*38mm / 3.62*4.25*1.49in Net Weight: 256g / 0.56lb Package Weight: 410g / 0.90lb Package Includes 1 X Audio Player 1 X Remote Control(without Battery) 1 X Bluetooth Atenna 1 X FM Antenna 1 X USB Cable . Products number : SOMONO94898