A device (2203, 2301, 2401) for monitoring and notifying at least one user of the status of at least one parking space (202, 1801, 2201, 2202, 2204), comprising: at least one transceiver which transmits at least one pulse and receives at least one echo from said pulse that has reflected off an object occupying said at least one parking space (202, 1801, 2201, 2202, 2204); at least one processing unit (305, 404, 606) configured for measuring time between said pulse and said corresponding echo for determining status of said associated at least one parking space (202, 1801, 2201, 2202, 2204); at least one power source for supplying power to said at least one transceiver, and said at least one processing unit (305, 404, 606). at least one light emitting diode array (204, 301, 401, 506, 604, 2602) capable of at least one visual notification through the use of emitted light colors, light flashing rates, and light flashing patterns for notifying said at least one user of status of said at least one parking space (202, 1801, 2201, 2202, 2204); and a housing (201, 306, 406, 601, 1101) for containing said at least one said housing transceiver, being specifically designed to provide protection of internal components against adverse effects of the environment and against adverse effects of vertical and sheer stresses from motor vehicles rolling over housing (201, 306, 406, 601, 1101), said at least one processing unit, said at least one power source and said at least one light emitting diode array (204, 301, 401, 506, 604, 2602); characterized in that said transceiver comprises a plurality of transceiver components for mounting a plurality of corresponding parking spaces (202, 1801, 2201, 2202, 2204), said power source also supplies power to said at least one light emitting diode array (204, 301, 401, 506, 604, 2602), and said plurality of transceiver components are located on opposing edges of the device in the direction of the parking spaces (202, 1801, 2201, 2202, 2204). at least one transceiver which transmits at least one pulse and receives at least one echo from said pulse that has reflected off an object occupying said at least one parking space (202, 1801, 2201, 2202, 2204); at least one processing unit (305, 404, 606) configured for measuring time between said pulse and said corresponding echo for determining status of said associated at least one parking space (202, 1801, 2201, 2202, 2204); at least one power source for supplying power to said at least one transceiver, and said at least one processing unit (305, 404, 606). at least one light emitting diode array (204, 301, 401, 506, 604, 2602) capable of at least one visual notification through the use of emitted light colors, light flashing rates, and light flashing patterns for notifying said at least one user of status of said at least one parking space (202, 1801, 2201, 2202, 2204); and a housing (201, 306, 406, 601, 1101) for containing said at least one said housing transceiver, being specifically designed to provide protection of internal components against adverse effects of the environment and against adverse effects of vertical and sheer stresses from motor vehicles rolling over housing (201, 306, 406, 601, 1101), said at least one processing unit, said at least one power source and said at least one light emitting diode array (204, 301, 401, 506, 604, 2602); characterized in that said transceiver comprises a plurality of transceiver components for mounting a plurality of corresponding parking spaces (202, 1801, 2201, 2202, 2204), said power source also supplies power to said at least one light emitting diode array (204, 301, 401, 506, 604, 2602), and said plurality of transceiver components are located on opposing edges of the device in the direction of the parking spaces (202, 1801, 2201, 2202, 2204).