DESIGN: It’s lightweight neckband design offers more freedom of music. The built-in magnet attracts the earplugs to the slots of the neckband when you don’t use them. BLUETOOTH 5.0: Advanced chipset delivers premium quality sound and Bluetooth 5.0 technology ensures a skip-free listening experience with a strong and reliable Bluetooth connection. FEATURES: Integrated Controls, Up to 5H Playback, IPX4 Splash Proof. BATTERY:100 mAh Built-in lithium-ion battery; Only 1.5 hours charge gives you up to 4 hours talk time/audio playtime, enough to power your workouts with music for a week. IPX4: IPX4 water Resistance function provides all-round and angles waterproof protection for the earphones. Whether you are jogging or sweating in the gym does not affect the normal use of the earphones.