- Capacitive touch mute button with LED-1500mA built-in Li-Ion battery-Micro-B port for charging BYOD microphone and upgrading-Low power indicator-Bluetooth v2.1+EDR protocols-Proprietary 2.4GHz wireless technology-Ultrasound pairing technology-High quality audio coding with error tolerance-Built-in 8 omni-directional MEMS with 5-meter pickup range