TOPP electric actuator model C30 with double link articulated chain, in special casing, complete with support and accessories for top and bottom hinged windows. Functions at 230V~ 50Hz, or alternatively, at 24V DC. Maximum load applicable 300N. Rapid fastening to the window. Stroke adjustable from the outside using the selector switch with stops at 20 and 38 cm. Electronic with acoustic warning to signal erroneous installation to the user. On request, available in a version designed for the USA2 synchronization unit, for simultaneous operation of 2 actuators installed on the same window frame. The device is marked with the CE seal.