Product information: Bluetooth protocol: 5.0 Channel: stereo How to use: earplug style Single or dual ear: bilateral stereo Bluetooth version: V5.1 Noise reduction version: cVC8.0 Working distance: connect within 10 meters Single ear capacity: 50 mA Charging bay capacity: 2000 mA Endurance time: accumulated about 220 hours (need to be used in conjunction with the charging bay) Talk time: about 180 hours accumulated (need to be used with charging bay) Headphone charging: about 40 times Charging bay input current: 5V 1A Magnetic absorption function: magnetic absorption nano-charging Control method: touch operation Color: R12 luxury mirror versionblack [with flashlight + emergency charging for mobile phone + 5.1 automatic seamless docking], R12 luxury mirror version white [with flashlight + emergency charging For mobile phone + 5.1 automatic seamless docking], F9-47 flagship Large screen versionBlack [with flashlight + emergency charging for mobile phone + 5.1 automatic seamless docking], F9-47 flagship large screen version white [with flashlight + emergency charging for mobile phone + 5.1 automatic seamless docking] Packing list: Headphone*2 Charging compartment*1