M10 TWS Wireless Earbuds with 3500mAh Charging Power Bank LED Display 3D Touch Bluetooth Headset Color: Black Features: Sports & Fitness Type: Headphones Design Type: In-ear Connectivity Technology: Bluetooth Wireless Microphone: With Microphone Length: 10.0 (in mm) New Upgraded 5.1 Chip : stable full-core upgrade, compared with the old version of Bluetooth 5.0, the transmission distance is greatly improved, the signal stability and anti-interference ability are enhanced, and the standby power consumption is reduced (just need 2 seconds ) and universal compatibility. Rid of cord, enjoy true wireless. With the individual LED display on the case can help check the remaining power of the wireless bluetooth earbuds and charging case at any time.