This is a housing/keys for a NRF24L01 based, battery powered Wall mountable Remote Control. The Keys are engineered to be printed in one part (frame and six keys). After printing you can break free the keys and they can be moved then. This Thing is meant to work with the MySensors Porject and your favorite controller e.g. FHEM. The PCB and detailed instructions howto build this thing can be found there: http://forum.mysensors.org/topic/1018/contest-3d-printed-battery-powered-wall-remote-control I did not test the battery run time yet but standby current is r.a. 2.5uA which is much below self discharging, so I expect the remote to work quiet some time on one set of batteries.Print the parts, get the PCB, solder it, program it. Much work to do but it gives you a nice Remote Control for your Home Automation Project. Have a look at the MySensors Forum for detailed instructions how to build this thing: http://forum.mysensors.org/topic/1018/contest-3d-printed-battery-powered-wall-remote-control