Features: 1. Bluetooth-compatible 5.2 Chip: Effectively solve the headset and Android connection instability, faster and more stable connection, and more compatible. 2. HIFI Sound: With moving coil unit, rich layers, more surging and powerful bass, bringing you pure and lossless sound quality, so you can enjoy. 3. Long-lasting Battery Life: The charging compartment combines charging and storage, and intelligent display of power, the headphones can continue to listen to songs all day when fully charged. 4. 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. 5. 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: Bluetooth-compatible Version: 5.2 Transmission Distance: 10-15m Speaker Unit: 8mm Headphone Capacity: 40mAh Charging Compartment Capacity: 300mAh Charging Time: 2h Listening Time: 4-5h