Electric door bells; Electric light dimmers; Electric switches; Electrical plug device enabling connection and disconnection of power and/or control cables; Electrical plugs and sockets; Electronic access control systems for interlocking doors; Electronic regulating and control devices for the operation of light emitting diodes; Global positioning system (GPS); Headphones; PC tablets; Smart rings; Smartglasses; Smartwatches; Time clocks; Wearable activity trackers