Specification:1. Bluetooth version: V5.02. Bluetooth distance: 10m3. Charging time: about 1-2 hours4. Standby time: about 80 hours5. Music time: about 3 hours6. Talk time: about 4 hours7. Headphone battery: polymer lithium battery 45mAh8. Battery box battery: polymer lithium battery 280mAh9. Audio transmission format: HFP/A2DP/HSP/AVRCPOne-touch control to easily turn on/off, play/pause/switch music, hands-free calling for driving, work, meeting, running.One-to-two connection, you can connect two mobile phones at the same time.Smart Compatibility: Supports all Bluetooth mobile phones, tablets, notebooks, QQ music, movies, etc., and is universal to all mobile phones.Package Included:1 x TWS bluetooth earphone (left and right ear)1 x 280mAh charging case1 x USB charging cable1 x User Manual 1 x User Manual