Bluetooth version: V5.3 Talk/music duration 10 hours Includes: a charging , a pair of headphones, a charging case, instructions Charging compartment battery: 300mah Power Indicator To Extend Battery Life: Up To 8 Hours Of Music Playback Per Charge. SPORTS: These Wireless Headphones Are Nano-coated To Withstand Everyday Spills, Sweat And Rain. This Is The Choice For Strenuous Sports And Any Weather. Excellent Ergonomic Design: Make The Bluetooth Headset Fit More Closely To The Ear Canal, More Stable, Won't Be Thrown Off When Exercising, Not Easy To Loosen Or Fall Off. Bluetooth 5.3 And Auto Pairing: Bluetooth 5.3 Chip Provides Faster Pairing, Stable Connection And Signal Transmission. With Bluetooth Turned On, Simply Take Out Two Or Any Headphones And They Will Automatically Turn On And Connect. The Powerful Bluetooth 5.3 Chip Works Perfectly With Tablets, Laptops And Smartphones. CLEAR CALLS AND POWERFUL ONE-CHARGE FUNCTION: This Wireless Headset Produces Powerful, Dynamic And Detailed Sound With Excellent Sound Effects And Sound Dynamics. The Call Noise Canceling Feature Allows You To Talk Clearly And Immerse Yourself In Your Music.