Bluetooth-compatible connection, high-fidelity sound quality and stable performance Built-in microphone, supports hands-free phone conversation Built-in smart chip and noise reduction function, clear phone conversation With ergonomic design, mini and lightweight, comfortable to wear Digital display for showing the remaining power Built-in 300mAh charging bin, easy to charge the earphone on the go, long standby time and using time Great for running, hiking, cycling, car driving, business occasion, etc, enjoy superb sound quality instantly Specification: Wireless transmission distance: about 10m Headphone battery: 30mAh Standby time: about 100 hours Bluetooth-compatible version: V5.3 Voice assistant: Support Charging compartment battery: 300mAh Charging time: about 1.5 hours Applicable products: Smartphone (Android/for iOS) Package included: 1 Pair x Earphone 1 x Charging Case 1 x English and Chinese User Manual Other things not included