GOLREX Bluetooth Headphones Wireless Earbuds 36Hrs Playtime Wireless Charging Case Digital LED Display Over-Ear Earphones with Earhook Waterproof Headset with Mic for Sport Running Workout Black Computers & Tablets Work Principle The smart chip

Work Principle The smart chip of the adapter has WiFi and Bluetooth hardware

full charge your iPhone XR in 40 min

9V/2A Output: 5V/3A

with the portable charging case you will get 48hrs playing music

GOLREX Bluetooth Headphones Wireless Earbuds 36Hrs Playtime Wireless Charging Case Digital LED Display Over-Ear Earphones with Earhook Waterproof Headset with Mic for Sport Running Workout Black Computers & Tablets Work Principle The smart chip1. Dual LED Digital Display & 36hrs Playtime: Wireless earbuds with dual power display show the remaining battery of the case by the number on the screen, and the charging status of ear buds by up and down of the LED bar, which will fade when the headphones are fully charged. Bluetooth headphones with 650mAh charging case have up to 36hrs playback with 5 additional charges, you can get the extra electricity it takes to keep your music going. (5 6hrs