This was made to be part of a fake doomsday device. After activation by pressing the small metal activation lever a loud tone and 2 red LEDs go on for a second then off for a second. The pattern repeats itself for about 5 seconds then the device shuts off and waits to be re-activated again. Size about 3" x 2.4". Features 1 IC and 3 transistor circuit driving a 2 1/4" speaker. Operates on one 9V battery (not included). Completely assembled ready to go, but no case available.