... :200g 4. Contat resistance:0.5 O 5. Colour:red, green,white, yellow J-SAP-M-04D manual call pointTechnical ... , and can be widely used as an alarm start switch of fire alarm systems in buildings, or as a switch ... M-04D can be taken regular inspection when the fire alarm system is in monitoring condition. Insert the special key ... break the break glass. J-SAP-M-04D fire alarm call point break glass button