Description Comfort-fit: Ergonomic customized design, to ensure a comfortable ear sense Voice Prompt;Wideband audio supported, Voice-prompt for Paring, Power on/off, Battery Level etc. Ergonomic wireless earbud;Double safety,anti-off from accidental bump or shake. Strong compatibility and compatible with devices as long as they are Bluetooth support. Flexible, light weight, comfortable fit and durable design. Best choice when you do sports. Adopt true wireless technology, enjoy your wirelessly sports. Connect two devices at the same time, convert freely. Automatically connect the device connected before, convenient and fast. Intelligent charging box provides fast charge, worry free for endurance. Package Note: In order to give consumers more choices, we combine the same type of unilateral headphones and binaural headphones which without a Charging box.You can choose to buy headphones with a Charging box or without a Charging box. Pairing Note: 1. Press the power button for 3 to 5 seconds until the indicator light turns blue and red alternately. 2. Press one of the earphones to release the power button for 3-5 seconds, then continue to press the power button for 3-5 seconds, repeat 2-5 times, until the other headphone twinkle lights are out, and the two pairs of headphones are matched 3. Set your phone to bluetooth mode and search for the device. 4. Match the bluetooth headset. 5. Only the main headset has a sound when making a phone call Features: ●With Charge box ,charge very easy,and Portable. ●Portable charger lightweight and sweatproof design. ●Bluetooth version: dual-mode Bluetooth V4.1, ultra-low power consumption. ●Bluetooth use band: 2.4-2.485GHZ. ●Bluetooth transmission distance: 10-15 meters. ●Battery capacity: 60MAH lithium battery. ●Standby time: 130 hours. ●Talk time: about 4-5 hours. ●Charging time: 1-2 hours. ●Effective distance: 33ft / 10M ●Net weight: 4G ●Sound channel: stereo ●Using way: in ear ●Single side: yes, single side handsfree ●Color: black, white, gold, rose gold, red ●Charging voltage: DC 5V(circular hole interface) Earphone(TWS)and connection:long press the multifunction key two headset,and then double-click on either side of the multifunction key to enter the TWS pairing state,while the corresponding tone,when only the blue light flashes slowly when only the blue light flashes slowly when representing TWS connection. Note :Calls Only supports unilateral bluetooth headset,shutdown,play and pause can be made of any one of the connected headphones multifunction button control,another headset will synchronous control.The next time long press the multifunction button will auto connect. Common problems: NOT PAIRING: please check if the headset has entered pairing mode. (Turn the Bluetooth on and keep press the function key until the LED light flashing); DEVICE NOT FOUND: please check if you have turned on the Bluetooth function on your devices, or please kindly try to restart your phone; NOT CHARGING: please kindly check if you are charging correctly, if the earphone is completely out of power, it might take longer to be fully charged; VOLUME CONTROL: consider it’s so small size, you need to adjust the volume on your smart phone, there is only one key button on the earphone, for power on/off/answer or reject phone calls. Note: 1.Please allow 1-3cm (0.4-1.18") difference due to manual measurement and slight color variation for different display setting Thank you for your understanding, nice day!