Specification: Large 40mm Low Distortion Dynamic Driver Hybrid ANC Support Dual Device Fast Charge 48 Hours Battery Life Bluetooth Version:5.4 Distribution Profile: A2DP/AVRCP/HFP /HSP Codec: SBC /AAC/LDAC Charging Port: USB-C Working Distance: Over 10m (Unobstructed Open Environment) Support System: Bluetooth Devices and Mobile Phones Headphone Charging Time: About 1.5 Hour