|   | Instrument Performance: 0 to 10 km (0 to 33,000 ft) | Instrument Performance: Up to four layers | 
												
													Environmental Specification: -40° to +60°C  (-40° to +140°F) excluding batteryEnvironmental Specification: -20° to +50°C  (-4° to +122°F) with standard battery | Electrical Specification: 110, 115, 230 Vac ±10%, 50 to 60 Hz, 470 W maximum | 
					
						
							|   | Instrument Performance: 0 to 8 km (0 to 26,250 ft) | Instrument Performance: Up to four layers | Environmental Specification: -40° to +60°C (-40° to +140°F) excluding battery | 
												
													Electrical Specification: AC power source Electrical Specification: 115/230 Vac ±15% (auto switching), 50 to 60 Hz Power drain from 230 V is 15 W minimum, up to 380 W with all the heaters on. (Optional current limited mode: 250 W max.) |