Fans of the original series have seen this item used a thousand time in the show and now they can have their Star Trek Electronic Door Chime alert them to any alien presence. The door chime is battery-operated and fairly light-weight, you could attach it without any drilling or nailing. The device has three operating functions. The first creates and the classic Star Trek wailing sound, while the second accompanies this with the door opening “woosh” from, the show. In the final position, shields are down and the wailing klaxon of “RED ALERT” is belted across the USS Enterprize, or your house.