Headset Bluetooth version V5.0 Charging case capacity 200 mAh Play time 4-5 hours Charging time 1 hour Standby time 120 hours Working distance 10 meters Bluetooth protocol HSP, HFP, A2DP, AVRCP Experience vivid sound quality HiFi large dynamic coil, while adding composite diaphragm design, every song/movie scene can be more fully analyzed, giving you a full range of three-dimensional sound Long-lasting listening to natural sound BO's audio technology can adjust the acoustic performance and keep you captivated Enjoy sound beyond the classroom with a combination of dynamic units and full-wrap earcups Stereo earcups: no pressure on the ears and no sound leakage over time Stereo headband. Soft and comfortable: comfortable to wear, no pressure on the head Bluetooth 5.1 + EDR zero-sense delay New Bluetooth 5.0 + EDR dual transmission, signal left and right synchronous transmission, to further improve data processing efficiency to reduce delay by 60%, more than 3 times the previous generation of products, whether Android or iOS Color: White Package includes: 1 * headset