Apparatus for measuring the speed of golf swing; Baby monitors; Batteries, electric; Cameras; CD players; Computers; Electric locks; Fire alarms; Global positioning system (GPS) apparatus; Headphones; Meat thermometers; Microphones; Mouse pads; MP3 players; Notebook computers; Optical disk readers; Selfie sticks; Smartphones; Tablet computers; Tape recorders; Telecommunications transmitters; Video-telephones; Blank USB flash drives; Electric navigational instruments; Loud speakers