... price 4.IP:20 Price of LPG gas leak detector alarm SP-GS1. gas alarm(detect gas leak)2.high performance 3.favourable ... power, the POWER LED lights green. and thealarm give DiDi sound (the ALARM LED flash twice), thewindow display flashing “-“. After approximately 4min ... 3~9, the STATE LED light red, the alarm give slow Di--Di… sound whendisplaying3,4,5 and give quick DiDiDi-- DiDiDi ...