Black White Universal Battery Charger with LCD Indicator Screen and USB Port For Cell Phones, Music Player or Other Electronic Device Wall outlet adapter for 100-240V AC outlets (standard US outlets). Output: DC 4.2V, 400mAh Max. USB output: DC 5V, 500mAh Max. Suitable for charging Li-Ion battery with capacity from 300mAh to 2000mAh. Auto shut-off when charging is completed. Foldable Prongs for easy storage. LCD display shows charging battery symbol during recharging.