We at Newheek provide first-, second and third-speed hand switches, among which most customers purchase second-speed hand switches. The second gear switch controls the exposure through two gears, the first gear for pre-exposure, and the second gear for exposure. In order to ensure that the hand switch selected by the customer can be used, we will confirm the plug wiring method with the customer in advance. The second-speed hand switche is usually equipped with a 4-core cable, two of which are connected to the first gear, and two are connected to the second gear. If the customer requires us to install a crystal plug or other style plug, we need to confirm with the customer which two are connected to the first gear. Which two should be connected to the 2nd gear to correspond to the socket on the X-ray machine.