... Best Benefit High Technology Specifications 1,Self-testing anytime;2, Alarm memory & query record function;3, LCD display concentration (3 digitals ... );4.Three LEDS to indicate different status: power supply(green), alarm(red), fault(yellow);5, Circuit and sensor fault signal warning ... .Test/Hush/Reset Button with 3 LEDS 7. Low Battery alarm (alarm,LCD display $ LED indication)8, Can not be fitted with ...