Two people can use it simultaneously, and so you can use it with who you like and not the sounds of public for the others. BLUETOOTH V4.1 WIRELESS TECHNOLOGY: It can connect with 2 different devices simultaneously, would connect automatically with a phone paired previously. Ergonomically shaped mini ear-pod provide long time comfortable wearing. STRONG SIGNAL: With built-in Mic, great for hands-free calling, listening to music, news, etc., connect seamlessly with all Bluetooth enabled devices up to 10 feet away ULTRA LONG BATTERY LIFE:Ultra-low power consumption, 60MA lithium battery which allows for 3-4 hours of play music/call time and 120 hours of stand-by with a single charge of 1-2 hours. Bluetooth pairing, power on and power off, pretty easy to use COMPATIBLE: Can be used with all Bluetooth enabled mobile phones such as iPhone 8/X/ 7/ 7Plus/ 6/ 6s/6 Plus/ 5/5s/5c/iPod/iPad, Samsung galaxy S7/S8/S8+ /note 8, most Bluetooth-enabled IOS Android phones, Moto, HTC, Huawei, Smartphones etc STRONG MULTIFUNCTION ONE-BUTTON: Simply one press to answer calls/play/pause, double press to hang up, and long press 5 seconds to switch machine. With this mini size earphone, ideal option for job, sporting, chatting, driving, journey, etc in daily life The ultra-light, mobile charge storage space for your belongings for your users the service when charging and user can be fill out the headset from more than 9 times.