TRULY WIRELESS - Enjoy complete freedom of movement. RELIABLE CONNECTIONS - They’re designed to maximize the strength and reliability of a wireless signal. STAYS COMFORTABLE. STAYS PUT. - StayHear+ Sport tips are designed for comfort and stability. VOLUME-OPTIMIZED EQ - For consistent performance at any volume. WATER RESISTANT - IPX4 rating means these are earbuds that aren’t afraid of sweat or rain. BATTERY & CASE - 5 hours of battery. Place them in the protective case for safe-keeping and to recharge. The case provides 10 hours of battery.