Exquisite design and lightweight volume will give you a better experience. Multi button control will make it easier for you to use the product. Metal dust net. The metal dust screen prevents dust from entering the headphone hole and interferes with your experience. Sound quality is the guarantee of our products. Surround surround and voice switching will provide high quality call guarantee. Dual mode bluetooth v4.1, Ultra-low power consumption. This device can be quickly paired with smart phones, as well as a variety of Bluetooth devices. Bluetooth maximum transmission distance of 10 meters(30 feet). Built in high performance lithium battery 60mah, enjoy about 4 hours of high quality call time, standby time of up to 120 hours. With 1000 mAh Charging Power Bank Dock Interface, the battery can be quickly filled in 80 minutes for more than 7 times. How to Connect HBQ i7 TWS in Single or Both Ears :- Single Ear Connection: Long press the multi function button and release the button. The red and blue lights will flash alternatively. Open the Bluetooth in the phone and search for connection. Two Ears Connection: Long press the multi function button and double-click on either side of the multi function key to enter the TWS pairing state. There will be a corresponding tone and wait till only blue light flashes which represents the two ears connection. Manual is included in the package.