After Sales Service:We offer the top quality rollers to every single of our customers. If you have any questions, please contact us first. We will serve you wholeheartedly. You are protected by our 100% Hassle-free satisfaction and 60 Day Money Back Guarantee!. Lightweight: Home wall charger adapter allows charging at home or in the office via a USB cable connection. Simply plug in the USB cable, and plug the adapter into the wall. Compact, lightweight, portable, stylish, and easy to store. Compact Design: Heat resistant and Anti-throw design, Compact and Easy to carry, Comfortable grip, Suitable use for home, travel, office, and business trip. Parameter: USB Output: 1Amp 5V. Input:100-240V ~50/60Hz;Output:5.0V 1000mA. Multi-purpose: USB charger for PRITECH electric foot callus remover and most cell phones on the market.