Earphones factory Brief Introduction IP55 water proof, so sweating is no longer a problem. over ear type wearing, micro USB charging port for 2 hours, 6 hours playing music + conference calls, Bluetooth 5.0 applicable within the range of 10 meters (33 feet), dynamic appearance and extra fine cosmetic, easy to control. the product fulfilled CE/FCC/BQB standards, conform to most updated environmental requirement. It is such an environmental friendly gadget. Our R102 earphone with microphone and controller would be your best partner. Product Main Features & Parameters Bluetooth version: 5.0 Bluetooth IC: CSR8633 Bluetooth Protocol: A2DP, HFP, HSP, AVRCP, GAVDP, AVDTP Speaker Type: Bone Conduction Technology, 1W dual speaker Receiving Sensitivity: 88dBm Impedance: 8惟 Frequency range: 20鈥?0KHz System language: prompt tone in English Charging: MIC/USB port ( 2 hours ) BQB included (Y/N): Yes Mono/Stereo: Stereo Mic: Anti鈥恑nterference microphones, 鈥?2DB Battery: 180 mAh power battery Playing time: 6 hours Standby time: 10 days User Manual 1. Press the power button for 3 seconds to power on the headphone 2. The red and blue lights flash alternately when entering the pairing mode after Bluetooth headset power on (if it doesn't enter pairing mode, please press the multi function button for 3 seconds until the red/ blue lights flash alternately) 3. Open the Bluetooth function on your cell phone or the devices. Then search the bluetooth devices and choose pairing model name, enter "0000" pin code if required. Notes: 1. When the distance between the Bluetooth headphones and the bluetooth devices is further than 10 meters(33 feet), the bluetooth headphones will disconnect from the devices. After that, once they are within the range, they will automatically reconnected. However, if the bluetooth headphones with the devices disconnected exceeded 3 minutes, you may need to double click the "Mult ifunction Button" to reconnect the devices. 2. If the Bluetooth headphone is paired, long press the Multi function button for 3 seconds, the headphone reenters the pairing mode in which other cellphones can find the bluetooth headphone and connect it. Sound testing diagram ( Examples ) Testing PointEarphones factory website:http://www.kedocons.com/earphones/