Liger Bluetooth Headset for Apple & Most Other Smartphones - Retail Packaging - Black COMFORTABLE: Light-Weight and Sweat Proof. As light as 18 grams. Never a burden to the ears. Rubber coating is comfortable to touch and wear, soft and skin friendly. HD SOUND: Perfectly transfer HD music. Super sound performance. Built-in microphone. Detailed voice instructions to guide you for easy using. COMPATIBILITY: Comes with the recently updated Bluetooth 4.1 with enhancements in coexistence, better high quality connections, and improved faster data transfer. CALL FUNCTIONS: Built-in Microphone. Picking up and hanging up phone calls. In standby mode, double-click the MF button, can redial your last call. Shock absorbent design absorb vibrations, providing a stable viewing environment. Silicon lined grid keeps your Device safe and secure from falling.