Power adapter and mini ups 2 in 1 is anti-surge online power dc transformer = ac to dc mini ups adapter (transformer).It's a dc ups adaptor designed to provide emergency power backup to all kinds of dc power equipment such as routers, modems, set-top box, voip phone systems, surveillance system, alarm system and many critical telecom equipment. It can provide hours of operation during power failure at a low price of a traditional ups.Mini ups widely use for fingerprint attendance machine, fire safety system, security monitoring system, wireless camera, cctv camera ,personal treatment system,door security system, personal data assistant, emergency lighting, alarm system, personal communication systems, radio, digital cameras, camcorders, video camera,bluetooth devices, set-top box, voip phone systems, surveillance