Efficiency Control Type: Touch Wearing style: In-ear Security features: Waterproof Housing material: Acrylonitrile butadiene styrene (ABS), Polycarbonate (PC) Product type: Headset Product color Blue White Control type: On-ear Application: Calls/Music Packaging data Packaging type: Hanging box Package contents Cables: USB Type-A to USB Type-C Charging case: Yes Ports and interfaces Bluetooth version: 5.3 Connectivity: True Wireless Stereo (TWS) Wireless router range: 10 m Bluetooth: Yes Battery Charging source: USB Right earphone battery capacity: 40 mAh Battery powered: Yes Continuous audio playback time (with charging case): 25 h Supported battery type: Built-in Input voltage (headphones): 5 V Left earphone battery capacity: 40 mAh Music playback time: 6 h Charging time: 1.5 hours Battery capacity (charging case): 400 mAh Input voltage (charging case): 5 V Microphone Microphone type: Built-in microphone Safety warning Warnings Keep away from children. Do not use near sources of heat or fire. Check the condition of the batteries regularly to prevent leakage. Headphones Frequency response: 20 - 20000 Hz