The UPS (Uninterruptable Power Supply) by Allied Edison is a light weight (7.2 lbs), portable, non-variable source that converts  a 12 Vdc Lithium Ion battery to output 110 vac sine wave at 60 hertz. It also has four 12Vdc output jacks, and 4 USB ports to power electronic equipment such as computers or used to supply cell phone chargers, etc. It has a strong built in flashlight. The UPS plugs into a standard 120 Vac, 60 hertz receptacle for charging and indicates percent battery capacity remaining on a digital meter located on the front panel. The UPS can also be charged by a solar cell, sold separately or can be plugged into a vehicles cigarette lighter receptacle for use in remote areas. The UPS is an excellent compliment to the VS-3 power supply where a technician needs a variable AC/DC source and cannot run a power cord due to the remoteness of the work area.