The Sony WI-C100 are wireless in-ear headphones designed for everyday listening, calls and travel. They offer long battery life, clear sound with DSEE technology and a lightweight neckband design for comfortable use. With IPX4 water resistance and easy button controls, they are suitable for music, calls, commuting and daily activities. Key features Wireless in-ear headphones with Bluetooth connection Up to 25 hours of battery life Quick charging: 10 minutes gives up to 60 minutes of playback DSEE technology helps restore sound quality IPX4 splash and sweat resistance Built-in microphone for hands-free calls Voice assistant support Easy button controls for music, volume and calls Compatible with the Sony Sound Connect app Lightweight flexible neckband design Dimensions Weight: approx. 20 g Driver unit: 9 mm Frequency response: 20 Hz - 20,000 Hz Headphone type: closed dynamic