EGRD Wireless Bluetooth Earphone, Mini Invisible Bluetooth Headphone Earbud HeadsetHands-free Stereo Earphone with Noise Cancellation and Mic for iPhone 7, 7Plus, 6,6 Plus & Other Smart Phones Mini Invisible Design, lightweight and compact ideal for in-car calling or working use. Bluetooth 4.1 Version, faster paring, stable connection and streamless sound quality; connect 2 different devices in 10meters no-obstacle range simultaneously. Noise Cancellation Technology ensures the clear sound quality of the call or the music even if in the noisy environment. Long Battery Life, built-in 45mah rechargeable lithium-ion polymer battery. Up to 3 hours continuous talk time or 3 hours music time on a full charge. Notice : The Bluetooth is only for one ear . Not a pair. Duetothedifferenceofpeople'sear size,thisearphonemaybenotfiteveryone. Iftheoneyougetisnotperfectforyou,pleaseletusknow.We will find the best way to help you fix it.