E-MARK MINI DC UPS GM4 For Routers n n Normal Router 7-8 Hours Backup Time n•Portable n•With Li battery 8800mAH n•DC5V/7.5V/9V/12V selectable n•With USB port n•Input Voltage :100V – 240V AC n•Small DC equipment, network peripherals such as: Modem, routers etc. n•Constant DC output, long backup time, smart chip control, zero transition.