Feature for RB-T31 - The charging port is Micro USB for convenient charging. - Supports Voice between smartphone supports both iOS and Android. - Long connection distances up to 10 meters. - Wireless applications via Bluetooth 5.0. - Intelligent Noise Reduction - Quick Charging time: 1 Hours - Standby time 50 hours. - Talk time up to 6 hours - Music time up to 6 hours - You can play or stop music playback. - Super Lightweight 4g - Comes with microusb charging cable and instructions manual.