... /1,N type controller/1,Signal cable 3m/1 root, 5m/1 root ,Installation fittings/1 set;It is allowed to choose ... ,at this time ,signal cables are 2.5m/1 root,4.5m/1 root,(4)Controller:N type, inside installation,control 1 ... should be made on order; Cost-effective safety device,light barrier sensor SNB3230