BW&reg; Sports N2 Bluetooth 4.1 Wireless Bluetooth Stereo Headset Earbuds with Mic Handsfree Sweatproof Moistureproof In-ear Earphone For Samsung, iPhone, LG, iPad, PC and All Bluetooth enabled devices (red) Latest Bluetooth 4.1 version. longer using time, faster, more stable, lower consumption.Bring you a new usage experience Effectively prevent sweat and rain interfere with headset operation. Voice command say Yes or No decide whether to pick a call, free your hands to do what you want. "3 sizes ear buds: Use fine silicone ear buds, good sound isolation, 3 sizes to fit your wear demand. (Large), (Medium), (Small)" Noise reduction & Echo cancellation