Product information: Transmission range: 15m Functions: power display, call function, NFC function, voice control, music support, multi-point connection Bluetooth protocol: 5.1 Channel: stereo Usage: earplug type Color: black (ABS Bluetooth version 5.0), white (ABS Bluetooth version 5.0) Headphone capacity: 30mAh Charging capacity: 450mAh Packing list: Earphone *2 Data cable *1 charging bay *1