Item Type: Bluetooth EarpieceBody Material: ABSProduct Model: YYK 525Bluetooth Version: 5.1Wireless Frequency: 2.402GHz-2.480GHzTransmission Distance: 10m/32.8ftInput Voltage Current: 5V 1ACharging Port: Type CTalking Time: 10-12 HoursMusic Playback Time: 10-12 HoursStandby Time: 400 HoursEarphone Charging Time: About 1.5 HoursCharging Time Of Charging Compartment: About 1.5 HoursBuilt In Battery: Lithium Ion BatteryHeadset Battery Capacity: 100mAhCharging Compartment Battery Capacity: 500mAhSupport Protocol: AVRCP, A2DP, HFP, HSP, EDRPackage List1 x Bluetooth Earpiece1 x Charging Compartment1 x USB Charging Cable1 x Chinese and English Manual1CONVENIENT: Bluetooth earpiece is designed for calls, easy listening and noise reduction. You can free your hands when answering incoming calls, making it easy to talk. Designed for mute function, you can easily turn on the mute mode without taking out your phone. 2STABLE TRANSMISSION: Single ear bluetooth headset uses advanced bluetooth 5.1 to deliver an sound experience with faster transmission speeds, greater connection stability and longer bluetooth range. Can be charged with Type C charging cable. 3INTELLIGENT NOISE CANCELLATION: Wireless handsfree headset features intelligent noise cancellation to give you a clear sound experience. One touch control is smoother and clearer than ever, without worrying about signal loss or music loss. 4LONG STANDBY TIME: Wireless bluetooth earpiece has a built in premium battery that provides up to 12h of continuous talk time in 1.5h on a full charge. The charging case with LED display allows for 400h of ultra long standby time. Small size and easy to carry. 5COMFORTABLE: Bluetooth headset conforms to the shape of the ear to reduce pain and ear fatigue. Headset rotates 180 degree and ear hook rotates 360 degree. Streamlined design based on the ear wire provides a comfortable fit for long hours of wear without fatigue.