Specification: 100% NEW and in good condition Key Features The appearance of the product is exquisite, with exclusive private molds, factory private molds, and patented design. Adopt Bluetooth 5.1 chip design, with stronger compatibility and stability. Bluetooth reception (RX) and Bluetooth transmission (TX) in one. Equipped with a high-definition LED digital display screen, the working status and Bluetooth mode are clearly visible. Built-in DSP decoding chip, heavy and low sound effect, supporting adjustable three-gear gain. Upgrade the NFC function, and the phone senses one-touch connection. Controllable indicator light, soft and not dazzling, and the brightness of the light increases/decreases with the volume. Built-in 1200mAh rechargeable lithium battery, continuous listening to music for about 8 hours, with a battery life of up to 30 days Support USB flash disk/TF card playback and transmission, and support MP3/WMA/SBC/WAV/DTS/A52/FLAC/AAC/AIF/AMR/APP