Experience crystal clear sound and seamless connectivity with the LENYES R22 WIRELESS HEADSET. Equipped with Bluetooth 5.2 technology, enjoy up to 20 hours of music, calls, and more. Stay connected and hands-free on-the-go with this must-have wireless headset. Specifications Model: K55 Transmission distance: 10m Charging voltage: DC5V Talk time: about 20 hours Standby time: about 180 days Version: V5.2 Transmission frequency: 2.4GHz Charging time: less than 20 minutes Music time: about 20 hours Battery capacity: 140MAH Body size: 56 (length) * 25 (width) * 13 (height) mm (including back buckle height 20) Support protocol: Headset \ Handfree \ A2 DP \ AVRCP Headphone*1 Charging cable*1 Spare headphone*2pcs Instruction manual*1