... (135F) detection, UL521 and EN54-5 approved Security Alarm,heat detector, heat alarm with fixed and rate-of-rising temperature heat detector ... , heat alarm Feartures:1)2 or 4 wire modles2)Advanced detectiona and ... .5A@125VACDimensions:100mm (dia) x 46mm (ht) with baseWeight:120g/set with base, Security Alarm with UL,EN and CE