Harmony 9001K black selector switch with C cam has 3 positions, operates with a stay-put mechanism. This selector switch provides a versatile interface for controlling your machines. It is easily installed into a standard 30mm diameter panel cut-outs and is easily connected to control circuits. It provides an effective manner to set your machine in various operating modes. It is IP66 impact, dust, water and vibration resistant making it ideal for operation in harsh environments.