Transmit Range = 10-15m Wireless Sports Earbuds Depth-NoiseReduction Function Magnetic Suction Function Smart Compatibility High Bass Built-in 60mah battery provides about 3-4 hours of continuous music time &talking time and 80-100 hours of standby time with a single full charge. Bluetooth 4.1 technology provides a several-second and stable paring with your Bluetooth enabled device. With soft rubber earbuds, your ears will never feel pain easily. Clearly and exactly know how much battery left of this headphone while paired for iPhone or iPad & other brand Anroid smart phones Brand No Brand SKU 100462103_NP-1020758120 Compatible Devices Not Specified