Fangrui Product Details Plug And Play Support Usb Disk Playback,compatible With All Of 28gb Usb Flash Drives, Plug And Play, High-fidelity Stereo, Supports Mp3, Wav, Wma, Flac And Other Audio Formats. Built-in Microphone For One-touch Hands-free Calling,adopt Intelligent Noise Reduction Technology To Effectively Filter Out Background Noise, No Need To Hold The Phone Close To You Achieve High-quality Voice Calls, Allowing You To Maintain Clear And Smooth Communication. High Signal Coverage Of About 20 Meters Stable Transmission,achieve Barrier-free Long-distance Transmission Of About 10-20 Meters, Suitable For A Variety Of Indoor And Outdoor Scenarios, Stable Signal And Continuous Connection. Infrared Remote Control Controls Your Life With One Click,the Fast And Convenient Operation Experience Allows You To Easily Realize Various Functions Wirelessly. Just Can Switch The Previous And Next Songs/adjust The Volume And Other Functions. Upgrade To One-to-two, You Can Connect Two Mobile Phones To Listen To Music At The Same Time An