Smaate Mini7 Bluetooth V4.1 Wireless Stereo Earphone with Mic for iOS and Android (Black) BLUETOOTH 4.1+ EDR: Universal Bluetooth 4.1 wireless technology for Smartpohne and most bluetooth enabled device,allow connect two Bluetooth devices MUSIC&TALKING: Built-in HD and sensitivity microphone,clear sounds,easy control between voice calls and music,super good for driving & running. MINI&LIGHTWEIT: Smallest body and size,High quality lightweight materials, weighs only 5g, allows you to wear more comfortable. STANBY&CALLING TIME: Built-in polymer battery. Up to 4 hours of continuous talk time, 3.5 hours of music time,120 hours stanby time.(iPhone can show battery level) VOICE REMIND: Voice report number, low power remind,Connect/disconnect remind,Boot off prompts