Features: Long-lasting Battery Life: The charging compartment combines charging and storage the headphones can continue to listen to songs for 38 hours when fully charged. Intelligent Noise Reduction: Even when you are in a noisy environment this headset allows you to talk clearly as if you were communicating face-to-face without being affected by noise. Comfortable to Wear: Ergonomic features all-weather comfortable wearing feeling different designs of ear caps even in the process of strenuous exercise is difficult to fall off. Bluetooth-compatible: Effectively solve the headset and Android connection instability faster and more stable connection and more compatible. After-service: If you have any questions after receiving the product please feel free to contact us and we will provide you with a satisfactory answer. Specification: Music Time: 38h Battery Capacity: 400mAh Charging Time: 30min Standby Time: 360days Transmission Frequency: 2.4GHZ Charging Voltage: DC5V includes: 1 * Earphone