Apollo Conventional Waterproof Call Point without LED - 55100-003APO Apollo's Conventional Manual Call Points have been designed to comply with EN 54-11. The Manual Call Point consists of a 470 resistor in series with a normally open switch contact. The Manual Call Point helps reduce installation time as all the initial installation cabling is wired to a terminal block which connects neatly to the call point. Once activated, the manual call point can be reset by inserting the test key into the bottom of the unit until the key clicks into position. Remove the test key and push the front cover up until it clicks home.