Specifications: Bluetooth Version: V4.0+EDR; Model: S520; Operating Range: up to 10 meters(open air) Battery: 50mAh rechargeable lithium-ion polymer battery; Bluetooth Profile: HFP, HSP, AVRCP and A2DP; Charging Time: 1-1.5 hours; Playing Time: 4 hours(after full charge); Talking Time: 3-4 hours(after full charge); Standby Time: About 160 hours; Support incoming voice call, and iphones shows instant bluetooth battery; Micro switch built-in,support hands-free calls and echo cancellation; Pairing Instruction : Holding down the power button of the headset for 3 seconds or longer until you hear the voice "Ready to pair" and you see the flashing Red and Blue light, then choose Bluetooth earbud model on your cellphone to pair with the headset. Warm prompt: 1.The red light will come on when it is charging ,and change blue light when it is charged fully . 2.If you can't pair the bluetooth with your phone , please make sure this headset has been going into pairing mode. (Turn the bluetooth on and keep press the function key until the LED light flashing Red and Blue in turn ) 3.If your phone can't search the bluetooth, please kindly try to restart your phone,this bluetooth can work for most bluetooth device. 4.The bluetooth headset is only one, not a pair but fit in each of both ears . 5.The size of this bluetooth is derived from the test date of our engineers. It can be suitable the most majority of people's ear. Please kindly understand it could be not suitable for you completely. We will be much appreciate if you would like to contact us when you find the earphone is not fit for you. 6.Keep away from all children,do not put in mouth or nose. Package Include: 1. 1*One CSBROTHER earbud; 2. 1*User Manual; 3. 1*USB Cable;
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