?What you are looking is a widely used wireless control devices. It is suitable for electrical control circuit such as anti-theft alarm£¬ remote control electric windows£¬ signal control£¬ industrial control£¬ lifting equipment and so on. It uses fixed wireless code encoding£¬ has no direction. The switch will not disturb each other. Made of high quality material£¬ it can be used for a long time. Besides£¬ it is easy to install and convenient to use. You can install it by yourself without any difficulties. Do not hesitate; this device will never let you down.                                    Features                Made of high quality material£¬ it is duable for long time life<br>    All contacts has dual functions of switching circuit and self - clean<br>    Built - in screw - type connecting cable<br>    High secure and reliable<br>    Not use key for Press / Push to cut off power<br>    Must be use key to release<br>                                                            Specifications                        Ith     10A    <br>          Ui     660V    <br>          Dimensions     6.9 x 6.9 x 4.9cm / 2.72" x 2.72" x 1.93" (L x W x H)    <br>          Weight     172g / 6.07oz    <br>                                                             Package Includes                1 x 660V Red Sign Emergency Stop Push Button Switch & Key<br>