14.2mm Custom-Tuned Drivers Built-In Rechargeable Battery Up to 12 Hours of Playback per Charge Quick Charge: 20 Minutes for 2 Hours Use Bluetooth 5.0 aptX Wireless Technology Built-In Mic for Hands-Free Calling Control Knob for Music & Call Control Adjustable Ear-Fit System Magnetic Earbud Pause Function Rubberized Finish with Textured Remote