Formed by camera obscura, design with a labyrinth that allows the access of smoke but not to light, provided of sender and receiver that operates according to principle of scattered light and a circuit with electronic for a correct control. Output for remote alarm indicator, voltage stabilizer and automatic check operation, visible in a LED . Mounted in ABS white housing of 105 Ø x 68 mm high. Maximum consumption: 180 ?A in standby and 22mA in alarm. No includes the socket. Developped and made by AGUILERA™ Electrónica according to UNE EN54-7 standard. Certified by AENOR.