GH Brothers 24W 4-Port USB Charger Charging Station with iSmart Technology Certified Safe: GH Brothers's MultiProtect safety system ensures complete protection for you and your devices. 4 Port USB output lets you charge any two smartphones or tablet devices simultaneously, at top speed. Hidden blue LED power indicator. Contains internal protection mechanisms.Compact design,wide input voltage range of AC 110-240V. Reliable and friendly customer service ready to respond within a 24 hour time frame.6 Month Replacement Warranty and Lifetime Support Guarantee. You can charge more than just your smartphone or table with this handy, multi-port adapter. It will also power up your e-reader, Bluetooth headphones and nearly any other device that charges with a USB cord.