I use this little Case for wallmount with a nail. There is place in it for a Relais and it's electronic components and also a terminal strip and a fuse. At the upper side there are two holes for DC-Power and Trigger. At the downside there are two slots for small powercord, power inlet cable and output cable to lamp or other. At the front side there is a hole for a 5mm-LED. At the inner side there is up left and rught a holder for circuit board, in the middle a pin for fuseholder to put in the fuseholder and welding the pin withe iron to fix it, before there are four pieces and one pin in the middle to fix a terminal strip, left and right some leadthrough for fixing the power cord. I switch a lamp but also need for switch on the valve of my steam radiator.