When we buy new device such as Napco Security Technologies GEM-P400 we often through away most of the documentation but the warranty.
Very often issues with Napco Security Technologies GEM-P400 begin only after the warranty period ends and you may want to find how to repair it or just do some service work.
Even oftener it is hard to remember what does each function in Home Security System Napco Security Technologies GEM-P400 is responsible for and what options to choose for expected result.
Fortunately you can find all manuals for Home Security System on our side using links below.