KONE elevator push button KM51071111H03 KDS50/KDS330 Round Braille Button

KONE elevator push button KM51071111H03 KDS50/KDS330 Round Braille Button. KONE round button KDS50, installation size is 32mm. The external call buttons for up and down are not universal, the ones with double plug-ins at the back are for the middle layer up. The middle layer down, the lowest layer up, or the highest layer down are all single plug-ins. There are 2 types of plug-ins for the warning bell: single plug-in and double plug-in. This button is available in red light, white light, etc.