Technical Parameters: Working frequency 2.4GHZ-2.480MHZ Comply with Bluetooth V5.0 standard Support music,play music continuously for 12 hours (actual test time) Support phone:support phone,with microphone,continuous talk for 4 hours Support voice:support voice report,support Chinese and English (other languages can be customized) Wireless connection range:10 meters Transmitting power:Glass2 Support headset and hands-free profile Earphone built-in rechargeable lithium battery 200mAH Earphone talk time:6 hours Standby time:150 hours The weight is only 50g,suitable for long-term wear without fatigue;