1, Bluetooth 5.3; Chip: JLAC70062. Battery capacity: 400mAh, charging for about 2 hours3. Use time: 40 hours; standby 200 hours4. Size: 193*170*76mm; Weight: 193g5. Support Bluetooth, AUX, TF card mode6. Support Chinese and English prompts: double-click the M key in unpaired state