Electric actuator model ACK4 with a double link articulated stainless steel chain, enclosed in a special diecast aluminum casing, painted with epoxy powders, with different mounting accessories for top and bottom hung windows. Available in 230V or 24V DC versions. Max. traction and thrust force 300N. End of stroke adjustable at 100, 150, 200, 205, 300, 350, 400 mm by an external dial located on both sides of the actuator. Electronic device with acoustic warning to signal incorrect installation (buzzer). Upon request, a preset “S” version for the synchronised operation of more actuators on the same window is available. High protection IP 55 rated. CE marked device