Automatic Bluetooth 5.0 connection, IP67 rating (waterproof, sandproof, and dustproof), submersible in up to 3.3 ft of water for up to 30 min, Built-In Radio, TF card slot, 3.5 mm Aux-Port, compact size and long battery life (2000 mAh), Volume optimized EQ, HD Built-In Microphone for Hands-free calling, Airbuds Precision Engineered Sound