AWEI A990BL Wireless Bluetooth Sport 4.0 Music earphone Stereo bluetooth Headset sports Headphone with Mic Microphone headphones for smart phones For iphone samsung Support APT-X HiFi sound quality,Sweat and splash proof can let you enjoy outdoors activities. NFC quick paring, save your time and promote efficiency,CVC6.0 intelligent noise reduction to provide high quality music. Bluetooth version: CSR V4.1, NFC quick pairing, connect two phones at the same time Charging hours: 2hours, Playing time: 8 hours,Calling time: 10 hours, Stand-by Time: 180 hours Li-ion 130mAh Battery, Waterproof IPX4 level.