Superb Bass The headset uses a 13mm composite diaphragm loudspeaker. Let you enjoy excellent bass and HIFI sound quality. Long battery life After full charging, the earbuds can working about 5 hours. And the charing box can provide about 25 hours to earbuds. With HD Microphone A microphone with intelligent noise reduction, it allows you to make high-definition calls. It can be used for online courses or online meetings. Upgrade Bluetooth 5.0 Bluetooth 5.0 Stable without delay,Low power consumption.More stable,anti-interference. Universal adaptability it can work with all IOS and Android device with Bluetooth function. Mobile phones, tablets, laptops and ect Product Information Type: In-ear Bluetooth version: BT5.0 Transmission distance: 10M Music Time of earbuds: About 5 Hours Battery life of charging box: 25 hours Charging Time: About 1.5 Hours Charging box capacity: 300mAh The earphone battery capacity: 30mAh 1 * One pair of wireless earbuds 1 * Charging case 1 * Charging cable 1 * User manual