1. -in Bluetooth 5.0 module. 2.Bluetooth sound, perfect sound quality and effect. 3. 10M transmission distance. Support for mobile phones, ipods and other devices with Bluetooth function. 4. Bluetooth hands-free function, easy to answer calls. Bluetooth music control function. 5. -in rechargeable lithium- battery, battery capacity: 200mAh, can last about 1-2 hours per charge. Rated impedance: 4.0hm Rated : 3W Rated voltage: DC5V Frequency Response: 3dB Valid value: 1.2W Frequency range: 80Hz-20KHz supply: DC 5V Communication: Bluetooth source: battery Number of speakers: 1 Audio crossover: full frequency Playback function: mp3 Wi-Fi Music: Internet Radio Special Features: Mini, Wireless, Portable Audio output: single Speaker structure: sealed Speaker classification: woofer Interface type: -USB Colour:black Material:ABS+Silicone Package Contents: 1 * Bluetooth 5.0 Mini Speaker 1 * USB cable (40cm/15.7inch, random color,The specified color is not accepted) Only the above package content, other products are not included. Note: Light and different displays may the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.