Features: Head mounted wireless bluetooth-compatible earphones, intelligent active noise cancelling, 40mm composite diaphragm, providing HiFi sound quality enjoyment. Imitation metal adjustable headband, freely adjustment, earpads detachable. Quality protein skin earpads, soft and comfortable, evenly distributed pressure, comfortable to wear. BLE5.3 main control chip, with strong interferences resistant ability, low power consumption, fast transmission, and stable connection. Build in large capacity battery, fast charging, long battery seervice life, and long working time. Comes with headphone protections bag in the same color for easy storage and to avoid scratches. Specifications: Material: ABS Color: silver gray, milky white, black, purpled, blue (optional) Size: about 18.5x20cm/7.28x7.87inch Model: WH-53Max Chip version: BLE5.3 Loudspeaker unit: 40mm Transmission distance: ≤10m Sensitivity: -42±3dB Frequency: 20Hz-20KHz Battery capacity: 400mAh Charging port: Type C Charging time: about 2hrs Working time: about 12hrs Package Includes: 1Pc Headphone note: Please allow 1-2cm errors due to manual measurement. Please allow for slight color differences due to different display resolution.