Feature: 1. Mesh head bow: Using a dome mesh consists of a taut and breathable fabric that helps to disperse the weight and reduce the feeling of pressure on the head. 2. CONCAVE HEADPHONES: The concave structure of the internal headphones greatly increases the space for the ears to move and does not create a feeling of pressure when worn. 3. Sturdy Swing The 40-degree swing allows for immersive adjustment that is a prerequisite for sound quality. 4. Connected Use: When paired with an audio cable, the built-in microphone of the headset supports call and button operation. Specification: Name: Headphones Transmission distance: 10m Battery capacity: 400mAh Sensitivity: 105±3db Speaker diameter: 40mm Playback time: about 10h Standby time: about 120h Charging time: about 2h Built-in microphone: Yes TF Card: Support Charging port: USB Change song: Support (briefly press function key) Volume adjustment: support (press function key) Answer the call/hang the call: Support (briefly press the function key) Audio I/O interface: Support Packing List. Wireless Stereo Headphones * 1 Type C charging cable *1 The headphone connection line * 1 Manual * 1 Note: 1. Due to the light and screen difference, the colour of the item may be slightly different from the pictures. 2. Please allow 0.5-2cm differences due to manual measurement.