Item Type: Open Ear Air Conduction Headphones Material: Plastic Bluetooth Protocol: 5.2 Transmission Range: 10m/10.9yd Product Battery: 75mAH Lithium Battery (Shipped with Built in Battery) Features: Air Conduction, Power Display, Call Function, Music Support, Multi Point Connection Package List 1 x Bluetooth Headphones 1 x Charging Cable 1 x Instruction Manual 1COMFORTABLE TO WEAR: Open ear air conduction headphones with ergonomic design, free both ears, comfortable and stable, sports jumping without falling off. 2LONG BATTERY LIFE: Open ear sport headphones have a built in 75mAh battery with a low power chip and support Type C intelligent charging, with a 10 hour battery life and strong power. 3LIGHTWEIGHT DESIGN: Air conduction sport headphones with lightweight body design, so you can experience an unimaginable light experience, comfortable fit, painless to wear. 4BLUETOOTH 5.2: Wireless sport headphones use Bluetooth 5.2 chip, with longer transmission distance, faster speed and wider sound range, bringing you better HiFi sound quality. 5WATERPROOF: Wireless Bluetooth sport headphones are tightly designed with multiple processes, which can effectively prevent rain and sweat in daily life and apply to various scenarios with confidence.