【BLUETOOTH V4.2 UNIVERSAL COMPATIBILITY& SERVICE】 With Bluetooth 4.2 technology, it can provides more stable connection signal transmission. The wireless earbuds work with all smartphones, tablets and bluetooth enabled devices.Pairing up just take a few seconds..Any question, please contact with seller, we’ll try our best to resolve it as soon as possible. 【NOISE CANCELLING & CLEAR SOUND】WIth CVC 6.0 Noise Cancelling function ， my bluetooth earbuds can pairing with a mic to reduce vocal interference and enjoy clear and easy communication .These wireless earphone deliver natural and authentic sound performance with focus on getting a clear voice. 【COMFORTABLE FIT AND LIGHTWEIGHT】Sports headphones feature an ergonomic design with fit your ears, soft smooth surface have comfortable wearing won’t falling off. The surprisingly ultra light design at only 0.14 ounces net weight barely makes you feel anything during workout. 【STEREO AND MONO MODE& Safe Driving】Each earbud can work individually or in pair, wear one or both earbuds depending your own needs It can connect with 2 different devices simultaneously, and would connect automatically with a phone paired previously(33 feet). For the sake of your safety when you are driving, all TWS earphones allow only one earbud has calling function. for the original version, it is the right earbud. 【LONG PLAYING TIME】 Enjoyment of music for up to 2.5 hours on a single charge and 72 hours of stand-by, only take 1.5 hours to fully charged, battery status displayed on IOS device.The charger box is enough for 5 times of recharging your earphones. (60)