【40mm Large Dynamic Driver】Delivers powerful and authentic sound reproduction with enhanced bass response and crystal-clear audio quality. 【Ultra-Long 70-Hour Battery Life】Equipped with 800mAh battery capacity providing up to 70 hours of continuous playback and 200 hours of standby time. 【Comfortable Soft Foam Padding】Features soft sponge ear cushions that provide exceptional comfort for extended listening sessions without fatigue. 【Adjustable Metal Headband】Metal adjustable headband with flexible extension axis accommodates various head sizes for a perfect fit across different users. 【Advanced Bluetooth-compatible 5.4 Technology】Equipped with the latest Bluetooth-compatible 5.4 chip module, delivering ultra-stable transmission, strong anti-interference performance. Specifications: Material: ABS + Metal Bluetooth-compatible Version: 5.4 Speaker Size: 40mm Battery Capacity: 800mAh Music Time: Up to 70 hours Charging Time: 2 hours Standby Time: Up to 200 hours Frequency Response: 20Hz-20kHz Impedance: 32Ω Transmission Distance: Up to 10m Package included 1 x Wireless Headphones 1 x Charging Cable 1 x English and Chinese Manual Specifications Battery Yes Brand AZEADA Capacity Range ≤2000mAh Certificate CE-RED,CE-RoHS Channels 2.0 ColorStyle A Connection Bluetooth Packaging Type Colored Box User Manual (Language) English and Chinese Gross Weight 0.459kg Volume Weight 0.649kg Package Length 21.000cm Package Width 23.000cm Package Height 6.000cm