Feature: 1. Bluetooth Connectivity: The CD player supports 2 way Bluetooth connection, built in Bluetooth 5.3 technology, can be used as a signal transmitter to connect with Bluetooth earphones and speakers, or as a receiver amplifier to connect with smartphones, laptops, tablets. (If you want to connect the CD player to other Bluetooth devices, it can only work in playback mode.) 2. Rechargeable Battery: Equipped with 2000mAh battery, no need to plug the charging cable into the CD player when playing music, can be full charged within 4 hours, supports 12 hours of headphone playback. 3. Versatile Compatibility: Supports various CD formats, such as CD, CD-R, CD-RW, MP3, WMA. Can be connected to car via 3.5mm AUX cable (Bluetooth not supported) to enjoy music while traveling. Also supports USB input. 4. Compact and Lightweight: The CD player is compact and lightweight, you can enjoy your favorite CD music at home, while exercising, in the car, or while traveling. 5. Practical Function: The CD player also features repeated playback and playback speed adjustment function, suitable for language learners or music enthusiasts. Specification: Item Type: Portable CD Player Material: ABS Battery Type: Lithium Ion Battery 2000mAh (Built in) Power Supply Port: USB C Supported CD Formats: CD, CD-R, CD-RW, MP3, WMA Sound System: Stereo Rated Resistor: 4Ω Bluetooth Version: V5.3 USB Flash Drive Sound Formats: MP3, WMA, WAV. Package List: 1 x Portable CD Player 1 x USB Cable 1 x Earphones 2 Pairs x Ear Tips 1 x User Manual 1 x Sound Cable