1. Good sound treble clear bass deep 40mm subwoofer high quality HF level Cheah speaker 2. Multi-core dynamic speaker Stereo surround sound effect Large dynamic speaker, with tuning to redesign the high, medium and low tri-frequency, to restore the sound layering in a balanced manner. 3. Bluetooth 5.3 strong core, stable and no delay, longer mission distance, higher sound quality resolution, stronger sound field dynamics 4. Compatible with smart devices without restriction, smart compatible with Android, system, , system mobile phones, etc.<br><br>Bluetooth version:5.3 mission distance:10 meters Use time:12 hours Standby time:automatically shut down after 5-8 minutes Battery:500mAh rechargeable lithium battery Functions: Adjust volume, switch songs, answer calls, reject calls, hang up calls, Bluetooth playback, phone , Bluetooth reconnection, voice prompts, power display, FM, TF, EQ,LED lights, English broadcast, one for two Colour:White Material:plastic Size:18.5x17.5x7.5cm<br><br>Package Contents: 1 * headphone 1 * usb cable 1 * audio cable 1 * Chinese and English instruction manual<br><br>Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.