bluetooth mobile wireless with mach 90 integrated battery headset and 20

"bluetooth mobile wireless headset, microphone with mach 90 integrated magnet, performance:" built-in magnet: when you do not use, you can connect two headphones together and use them. embedded 90 mach batteries provide about 4 hours of continuous music time, 5 hours of conversation time and 200 hours of single load waiting time. bluetooth technology 4.1 provides a multi-second stable paring with you. open ooth soft candy headphones, your ears won't ache easily, and i know exactly how many batt