The latest Bluetooth-compatible 5.2 version, fast matching with mobile phones Large-capacity battery, built-in low-power output, continuous talk/play music for up to 20 hours Support vibration reminder for incoming calls, also with vibration prevention reminder beyond a certain distance Clip-on design, safe driving with high-definition calls, can connect two mobile phones at the same time Support voice prompts in both Chinese and English languages, LED power display, caller number reminder Built-in 140mAh battery, Type-C charging port, support fast charging, charging in 20 minutes Specifications: Headphone version: V5.2 Transmission distance: 10m Transmission frequency: 2.4GHz Charging voltage: DC 5V Charging time: about 20 minutes Talk/music time: about 20 hours Standby time: about 180 days Battery capacity: 140mAh Package included: 1 x Earphone 1 x Large Ear Cap 1 x Small Ear Cap 1 x Charging Cable 1 x English and Chinese User Manual Other items not included