Bluedio TWS T-elf Bluetooth Version 5.0 In-Ear Bluetooth Headset with Headphone Charging Cabin(Black)

1. Bluetooth version: 5.0 2. Transmission distance: 10 meters 3. Battery type: built-in lithium polymer rechargeable battery 4. Function: Voice over IP: Support 5. Music playback: support for devices with Bluetooth 6. One for two functions: support 7. Voice prompts: Four language tips 8. Caller ID: Not supported 9. Standby theoretical time: up to 249 hours 10. Call theory time: up to 12 hoursSpecification: Package Weight One Package Weight 0.13kgs / 0.29lb One Package Size 13cm * 11cm * 6cm / 5.12inch * 4.33inch * 2.36inch Qty per Carton 100 Carton Weight 13.50kgs / 29.76lb Carton Size 62cm * 57cm * 28cm / 24.41inch * 22.44inch * 11.02inch Loading Container