This clip on safety light has a three position push switch for flashing, solid on and off. It is black plastic with a red lens over lights and has a 1" screw and nut closure for the clip mount pivoting attachment. Operates on 2 "AA" batteries which are not included. Comes packaged in a plastic sleeve with hanging hole. The light case is 2 3/4" x 1 3/4" x 1".