Skullcandy Method Bluetooth Wireless Sweat-Resistant Sport Earbuds with Microphone, Secure Around-The-Neck Collar, 9-Hour Rechargeable Battery, Perfect for Working Out, Navy/Blue IN EAR COMFORT: Advanced DualLock technology and flexible around-the-neck collar keep the earbuds in place even during long, intense workouts. SWEAT RESISTANT: Secure, water-resistant construction with advanced materials keeps your earbuds safe from perspiration and moisture while you exercise. MICROPHONE INCLUDED: Never miss a call while working out; connects to your phone via Bluetooth. LONG BATTERY LIFE: A 9-hour rechargeable battery keeps the music going for your workout and throughout the day. Plus, the battery fully recharges in just 2.5 hours. EASY TO OPERATE CONTROLS: Built-in remote on the collar includes call, track, and volume controls.