SPECIFICATIONS for the EM-11 Temma II M Drive System: Dual aces, quartz control, driving frequency: 100pps N/S, Star/Sun switching by hand controller Usable Area: All over the world, but with limit for the latitude High Speed Drive: 150X at DC12V Correcting Speed (manual operation): RA: 0.1 - 1.9x to the sidereal rate by 0.1x increments Dec: -+ 1.5 - 14.65 arc sec/sec by 1.5 arc sec/sec increments Mode indicator: High Speed operation - red light Normal operation - green light Power Source: DC12V Power Consumption: DC12V: 0.3/1.3A(1.7A) sidereal/high speed(start) Go-To Operation: By a PC or Takahashi Advanced Hand Controller (available 12.2010) Go-To Disc. Pegasus 21 Accessory: RS232C cable or RJ-14 , ST-4, ST-7, Star Shoot cables Operational Temperature: -5 - +30C