The Mini-UPS works as a portable power source for FingerTec time attendance models. There are 2 models, which can supply 5VDC and 12VDC power for different models. They are a small but long lasting power source. You can recharge the Mini UPS using the same power adaptor of your FingerTec terminal, without having to keep track of an additional/special charger. The Mini UPS can last up to 4 hours* of operation.