True wireless headphone having no wires. support by Wireless Split Technology, the left earphone can communicate the right earphone without any wire, the two earphones can be used simultaneously, also one of them can be used separately . Compatible with IOS, Android, or Windows do not worry the system compatibility issues. The earphones can connect your devices by Bluetooth function. The device can be mobile phone, laptop, tabletand so on. Light weight easily carried and stored. designed to fit your ears perfectly, and suitable for any occasion like sport & Exercise, business, travel, work, gym. High quality sound give credit to Bluetooth CSR 4.2 technology, built-in CVC 6.0 Noise Cancelling technology, and professional sound chamber design, from the phone to earphones, from the headphones to ears, or internal circuitry, every stage is always designed for perfect sound experience. Long hour usage: Built-in 65mAh rechargeable lithium battery, it can support playing music for 2.5 hours with two earphones (for 5 hours with one earphone). The standby time can be 60 hours with two earphones (for 120 hours with one earphone). The battery can be fully recharged in an hour.