Remax Wireless Bluetooth Headphone Remax Wireless Headphone Bluetooth 5.4 Over-Ear Headphones Black [ RB-900HB ] Product s: Active Noise Cancellation : Up to -38dB for pure, uninterrupted sound. Dynamic Sound Quality : 40mm fiber diaphragm drivers delivering deep, bass-driven audio. Extended Playtime : Up to 20 hours. Latest Wireless Technology : Advanced wireless 5.3 ensures low latency and seamless connectivity. All Day Comfort : Pressure-free ear cups designed for long listening sessions. Versatile Connection Options : Freedom to switch between wireless or wired listening. Specifications: Product Model RB-900HB Wireless Version V5.4 Transmission Distance 10M Frequency Response 20Hz-20KHz Impedance 32Ω Rated Power 25mW Driver Unit 40mm Battery Capacity 400mAh Input 5V-500mA Play Time ≈ 20H Standby Time ≈ 180H Charging Time 2.5H Net Weight ≈ 218g For More Info. Click Here For More Remax Product Click Here