Keweier Wireless Bluetooth Headset Headphone Earphone, Bluetooth 4.0, for Smart Phones (Grey) Up to 4 hours of talk time or 90 hours standby Bluetooth 4.0 Technology, wirelessly stream music and phone calls Package content: Bluetooth Wireless Headset, User Manual, Charging Cable, 2 x eartips High clarity sound with active noise cancellation Pairs easily with iOS, Android, and Windows devices, supports iOS battery display, connect to two devices at the same time