... feature:1 Multi opening modes, advanced password opening, card +password opening, legal card opening , button , four opening modes, more safe ... quality, and waterproof totally Technical parameters:working voltage: AC10V/20W±10%(DC12V/1A±10%)working temperature: -30°C ~ +70° ... external if more than this parameter.)storage capacity:50000pcs card,60000pcs recording data offline data storage time:more than ...