I purchased this from 3COINS, but I haven't had many opportunities to use it. I've only tried it on at home once or twice. 【Product Description】 These are open-ear headphones that allow you to hear the surrounding sounds while enjoying music, without completely blocking your ears. The ear cuff design allows you to wear them like an accessory. The case clearly displays the remaining battery life. The charger is sold separately. Please prepare one separately. [Compatible USB cable] USB Type-A to USB Type-C cable (L-shaped Type-C cable/Type-C cable) [Compatible AC adapter] AC adapter with an output of 5V 2.4A or less (AC adapter for fast charging/AC adapter with 2 fast charging ports) *Do not use charging devices that support PD (Power Delivery). *Do not use fast charging adapters that use voltages of 5V or more. 【High-Quality Sound and Comfortable Fit】 The open-ear design, shaped like an ear cuff, allows you to enjoy music while hearing the surrounding sounds. They fit gently in your ear and are comfortable for long periods of use. 【Convenient Battery Display】 The case has a display that shows the remaining battery life at a glance, so you won't miss the charging time. Charging time is short, and they can be used quickly. 【Excellent Connectivity】 Bluetooth 5.3 provides a communication range of up to approximately 10m. It offers a stable connection for a stress-free music experience. - Bluetooth version: 5.3 - Maximum communication distance: Approximately 10m - Charging time: Approximately 1 hour to 1 hour 30 minutes - Continuous playback time: Approximately 5 hours - Waterproof performance: IPX4 - Case display: Battery level indicator - Design: Ear cuff type earphones - Color: White