Feature: Advanced Bluetooth chip and circuit design supports most Bluetooth devices. Support audio input, connect to Bluetooth speakers through output devices such as mp3/mp4, tablets, and mobile phones. The transmission distance is up to 10m, which is more compact and portable and easy to carry. Wireless portable mini bluetooth stereo speaker system, hands-free call. One device for two purposes: Support the phone to connect to two speakers at the same time, allowing you to enjoy double the sound effect when there are two speakers. Specification: Product name: Bluetooth speaker Color: black, red, blue orange, gray (Please tell us the color you want. You can send us an email to let us know. Otherwise we will send it randomly. Thank you for your understanding!) Connection distance: 10 meters Charging interface: USB, DC5V 1A Other interfaces: TF card slot, AUX port Battery: Lithium battery Charging time: 3-4 hours Play time: 4-6 hours Function: Bluetooth connection, one for two, TF card playback, AUX playback, FM mode, USB charging, hands-free calling Product size: 18*4.3*4.4cm It is very suitable for outdoor sports, exercise and travel. Package Included: 1* Bluetooth speaker 1* AUX audio cable 1* USB charging cable 1* Chinese and English teaching