12 hours of play time with charging case – Internal rechargeable battery offers 4 hours of play time per charge with an additional 8 hours of charge in the case. Charging time: 2 Hours Sweat- and waterproof (IPX7) – double hydrophobic Nano-coating for sweat- and waterproof performance. Sport fit – interchangeable silicone tips & fins provide a comfortable, secure fit in any ear size. Fast-charge battery – five minutes of charging provides 1 hour of play time. Premium sound with custom EQ – a unique, personalized music experience.