Features:   Long Lasting Using: Bone conduction concept wireless headphones have a built-in 150mAh large battery, providing you with battery life anytime, anywhere. Noise reduction: intelligent active noise reduction, reduce surrounding noise, clearer calls. Automatic connection: Every time the headset is connected to the mobile phone, the headset will automatically connect back to the mobile phone after it is turned on, which is convenient and fast. Smart compatibility: support all mobile phones, tablet notebook devices and all mobile phones with Bluetooth-compatibility. Not-in-ear design: Through bone conduction music, the cochlea is prevented from being stimulated by high-pitched sounds for a long time. Notice: 1.Actual color may be slightly different from the image due to different light effect 2.Please allow 1-3cm deviation due to manual measurement Description: Material: Plastic. Size: 17*11.5*2cm. Frequency range: 20Hz-20KHz. Playback duration: 8h. Charging time: 1h. Standy time: 300h. Horm impedance: 32Ω. Battery capacity: 150mAh. Package List: 1 x headphone