Model: MD03 TWS Bluetooth version: V5.0+EDR Color: black, white, red, blue Receiving distance: 10 meters Charging time: about 1-1.5 hours Music time: about 3-4 hours Battery type: polymer lithium battery Battery capacity: earphone 100mAh Support system 1: Android Support system 2: IOS Support system 3: Windows Features: Dynamic range box noise isolation Resistant to water and sweat, stable ear hook Brand new Bluetooth 5.0 chip, more stable connection Long battery life, up to 100 hours of playback Smart fast charge, fast charge 9D stereo HiFi sound 3D dynamic surround sound Magnetic charging compartment, digital screen display Stable ear hook, comfortable to wear