Chip: Qualcomm 3020 Wearing style:In-ear Charging Box Battery Capacity:260mAh Battery capacity:30mAh Bluetooth frequency:2.4GHz Talking Time:3-4 Hours Standby time:40 Hours Working distance:10-15m Features (selling points) provide data: for IOS system, open a pop-up window/support siri Certification: CE ROSH HD signal type: SBC/A2DP Support wire control/support button operation: Touch Occurrence principle: double hair Wireless link mode: Bluetooth 5.0 Waterproof grade: IPX3