Item Type: UPS ModuleMaterial: Phenolic ResinInput Voltage: DC5V-12V (this voltage is the voltage when charging the battery)Output Voltage: DC9V or DC12V Can Be Selected (default is 9V, you can also change the jumper to set to 12V, the output voltage is the voltage when only using battery power, if there is a charging input, the output is equal to the input)Output Power: 12W MaximumBattery Capacity: 1-3AH (maximum 5AH)Board Size: Approx. 50 x 20 x 6mm / 2.0 x 0.8 x 0.2inPurpose: Suitable for Use As Backup Power Supply After Power Failure of Routers, Switches, Alarms, Cameras and Other Equipment1Charge the battery when there is power, and automatically use the battery when power is off.The battery is automatically charged and discharged 2With input reverse connection, overheating, overdischarging, and short circuit protection, you can use the UPS Module with confidence 3At least 20AWG wire should be used for welding input and output, and the wire length should not exceed 10cm/3.9in 4The control board will generate heat when working, so keep a certain distance from the battery when installing 5Suitable for routers, switches, alarms, cameras and other equipment to be used as backup power after power failure1 x UPS Module