Cameras; Earphones; Hydrometers; Microphones; Scales; Smartglasses; Webcams; Automatic pill counters; Battery charge devices; Biometric fingerprint door locks; Electric door bells; Electrical plugs and sockets; Electronic book readers; Electronic collars to train animals; Electronic navigational and positioning apparatus and instruments; Electronic notice boards; Infrared detectors; Lighting controls; Multimedia projectors; Optical lamps; Portable media players; Power strips; Power switches; ...