A hand held digital clock which keeps track of astronomical time for astronomers. Keeps track of UT(universal time), GST(Greenwich sidereal time), LST(local sidereal time), and LMT(local mean time). Runs off 9 volt user changable battery. Comes with SkyCalc PC software which gives a display of all the times on your computer. Will sell for $30 plus shipping. Paypal or money order.