Wireless: Compatible with Bluetooth 5.0 and above. Bluetooth headphones: Get a pair of Bluetooth wireless sports earphones. Rechargeable: Comes with a 400mAh charging case. Charging time: Up to 30 hours standby time off 1-2 hours of charging. Ergonomic: Designed to remain comfortable and give a clear sound while running or walking. | Bluetooth Wireless Sports Headphones - Black | Wowcher