new bluetooth v5.1 tws earphone wireless in-ear touch earbuds headset led display 1500mah charge case for android ios smartphone

1. bluetooth: v5.0+edr 2. transmission distance: about 10m 3. rated voltage: 3.7v 4. battery: built-in 50ma rechargeable battery 5. charging case battery: built-in 800mah rechargeable battery 1. a1 uses the latest jerry latest bluetooth chip 6936d, which has stable transmission and low power consumption. music time the measured distance is 4 hours (medium volume) and the distance can reach more than 20 meters. 2. headphone battery 50 mah, charging box battery 1500/2600 mah optional, not only can charge the headset, but also can be used for emergency charging of mobile phones