OWIKAR Mini In-ear Invisible Bluetooth V4.0 Headset Wireless Stereo Bluetooth Earphone Headphones Earbuds Hands-free with Mic for iPhone Samsung HTC Smartphones iPad Tablets(Beige) Bluetooth version: buletooth V4.0. Bluetooth distance: About 10 metres.please use the 5V 2.1A usb power adapter when charging this devices Talking time: About 4 hours; Playing time: About 3 hours; Stand-by time: 3 to 5 days; Charging time: About 1 hours Coming out Clear sounds for Stream music and phone calls, attach with a wired assistant EarBud,which can connect to the main earbud, change from Mono to Dual channel, listen to music through both ears if you need; Flexible change between voice calls and music Access to Multipoint connections between two mobile phones at the same time; Good call quality and range Compatible with IPod, IPad,Car Kit, Samsung Galaxy Note 3, Note 2, S6, S5, S4, S3, S2, LG, HTC, MOTO X, most Bluetooth enabled devices