Calus Round-9 Wireless Earbuds.

Connectivity: Features Bluetooth version V5.3 for wireless pairing. Battery Life: Offers approximately 4 hours of music playtime and 3 hours of call time on a single charge. Battery Capacity: The earbuds have a 25mAh battery, while the charging case has a 200mAh battery. Features: Includes side-touch mode for controls and HiFi surround sound quality.