Bluetooth Earphones, In Ear Sleep Earphones, Hidden, Compact, Music Calls, Long Battery Life Features: Bluetooth compatible headset adopts Bluetooth compatible chip 5.3, with fast and stable transmission speed and strong -interference ability. Ergonomic design makes it comfortable to wear. It can be used with all Bluetooth-equipped devices. The headphones are so lightweight, you'll forget you're wearing them. Running and exercising are no problem as the earlobe is firmly in place when worn. With design, it can be used even when wet with sweat. Using ABS materials and electronic components, the wireless headset is and. Full of a sense of technology, say goodbye to cumbersome pairing, pick up the Internet with seconds of power on, experience the wireless sound. Suitable for your home, office, travel, sports and other. Product Description: Bluetooth scheme: V5.3 Operating distance: 10M talk time: About 4.5h Music playing time: About 4.5h standby time: About 50h Battery type: li polymer Headphone battery capacity: 35MAH Battery capacity of charging box: 350MAH Headphone charging time: About 1.5h Charging of charging box: About 2 hour frequency: 40-20KHZ grade: 5 Package includes: 2 x Bluetooth Earphone (L&R) 1 x Charging box 1X USB charging cable 1 x user manual