Electric actuator , model C30 with double link articulated chain, contained in a suitable casing, complete with support and fitting accessories for top and bottom hung windows. Operation at 230V 50Hz or, as an alternative, at 24V DC. Maximum applicable load 300N. Rapid hooking system for the adjustment to the frame. Stroke adjustable at 20 or 38 cm by an external selector.           Electronics with acoustic device that warns of any incorrect installations. Onrequest, preset version for the USA2/3 synchronisation unit available for the simultaneous running of 2 or 3 actuators on the same window. CE marked device complying with the following directives: EEC 89/336, EEC 73/23 and following amendments.