Made for life on the move, the WH-CH510 headphones have a lightweight design and are fully wireless. With up to 35 hours of battery life, they'll have you listening throughout the day. Bluetooth® wireless technology for unrestricted movement Up to 35 hours of battery life for all-day power and quick charging Easy hands-free calling and voice assistant commands with microphone Compact and lightweight, swivel ear cups allow easy portability Hear more detail with the 30-mm Driver Unit DRIVER UNIT 30mm FREQUENCY RESPONSE (BLUETOOTH® COMMUNICATION) 20 Hz–20,000 Hz (44.1 kHz Sampling) Full