New Caldwell E-Max Power Cords 1121933. Bluetooth compatible with mobile devices. Corded design to keep ear buds together. Auto shutoff after 4 hours. Comes with different tip sizes for a custom fit. Boxed with hanging tab. COMFORTABLE: Featuring multiple size tips, youll find a custom fit for your ear to ensure proper noise cancellation and hearing protection. EASE OF USE: Easily connect to your mobile device with Bluetooth. FEATURES: Your E-MAX Power Cords automatically shut off after 4 hours of inactivity, which is displayed on the illuminated on/off indicator. CONVENIENT: A corded design always keeps your earplugs together. Please contact Caldwell customer service for assistance. With our dynamic pricing model, our prices are always competitive. Our prices are some of the lowest that you will find on the internet. Rest assured that you’re getting a good deal when purchasing with us.