ALLOSUN EM272 Lambda Tester and Simulator Identifying which wire the tester is connected to, i.e. groun, heater or ECU supply. The tester allows the operator to verify which wire the tester is connected to LED light path displays the Crossover signals of the Lambda sensor. Rich or lean signal simulation to check ECU reaction. <span class="a-text-bold">Battery:</span> 9V, 6F22 or equivalent, alkaline <span class="a-text-bold">Low Battery Indication:</span> LED on the indictor panel lights <span class="a-text-bold">Operating Environment:</span> -10~ 50, &lt;75%RH <span class="a-text-bold">Storage Environment:</span> -20~ 60, &lt;85%RH <span class="a-text-bold">Size:</span> 147 x 81 x 29 mm <span class="a-text-bold">Weight:</span> about 250g Manual book Black color bag Ground clip (black) and wire- piercing clip (red)