Backlit Display with Larger Digits Easier to read in dark areas of the plant More Resistant to Accidental Damage Rubber Boot and Stronger Switches Separate Battery Compartment with 4 “AA” Batteries No more removing housing with screwdriver to replace three expensive 9V batteries. Calibration seals remain intact. Calibrate More Devices Between Battery Changes Drives more loop instruments at 24 Volts (up to 1200 Ohms) for entire battery life. The Altek 334 output voltage drops as the batteries run down.
