The present invention provides a hand shield adapted for use with a hockey stick. The individual measuring beams are axially offset to one another upon incidence on the specimen by an amount which is adapted to the axial spacing. The donning agent is transferable from the sheet to an object or individual apart from the sheet. When a risk of freezing exists, based on time and temperature, the storage tank can dump water. Furthermore, power to the flash ROM of the electronic device could be cut off by the signals sent to the oscillator, the clock pulse generator or the multi-enable module from the power control circuit as well.