An electrical device for mounting to an anchor, the electrical device comprising: a faceplate having a front wall and a sidewall , the front wall and the sidewall forming a recess ; a circuitry received in the recess ; and a mounting plate for mounting to the anchor; wherein the electrical device is characterized in that : the faceplate comprises one or more rearward extending screw-holes on the front wall for receiving one or more screws, and comprises one or more clips on the sidewall ; the circuitry comprises one or more first openings at locations corresponding to those of the one or more rearward extending screw-holes of the faceplate for the one or more screws to extend therethrough, and comprises one or more second openings on one or more edges thereof at locations corresponding to those of the one or more clips of the faceplate for the one or more clips to extend therethrough; and the mounting plate comprises one or more recesses on one or more edges thereof for engaging the one or more clips of the faceplate so as to engage the faceplate and sandwich the circuitry therebetween, and comprises one or more recesses at locations corresponding to those of the one or more rearward extending screw-holes of the faceplate for receiving therein heads of the one or more screws so as to reduce the thickness of the electrical device . a faceplate having a front wall and a sidewall , the front wall and the sidewall forming a recess ; a circuitry received in the recess ; and a mounting plate for mounting to the anchor; wherein the electrical device is characterized in that : the faceplate comprises one or more rearward extending screw-holes on the front wall for receiving one or more screws, and comprises one or more clips on the sidewall ; the circuitry comprises one or more first openings at locations corresponding to those of the one or more rearward extending screw-holes of the faceplate for the one or more screws to extend therethrough, and comprises one or more second openings on one or more edges thereof at locations corresponding to those of the one or more clips of the faceplate for the one or more clips to extend therethrough; and the mounting plate comprises one or more recesses on one or more edges thereof for engaging the one or more clips of the faceplate so as to engage the faceplate and sandwich the circuitry therebetween, and comprises one or more recesses at locations corresponding to those of the one or more rearward extending screw-holes of the faceplate for receiving therein heads of the one or more screws so as to reduce the thickness of the electrical device . the faceplate comprises one or more rearward extending screw-holes on the front wall for receiving one or more screws, and comprises one or more clips on the sidewall ; the circuitry comprises one or more first openings at locations corresponding to those of the one or more rearward extending screw-holes of the faceplate for the one or more screws to extend therethrough, and comprises one or more second openings on one or more edges thereof at locations corresponding to those of the one or more clips of the faceplate for the one or more clips to extend therethrough; and the mounting plate comprises one or more recesses on one or more edges thereof for engaging the one or more clips of the faceplate so as to engage the faceplate and sandwich the circuitry therebetween, and comprises one or more recesses at locations corresponding to those of the one or more rearward extending screw-holes of the faceplate for receiving therein heads of the one or more screws so as to reduce the thickness of the electrical device . <EOS>