Ready to measure as soon as they’re powered on, the e105 Series True Blue Digital Box Levels from Empire Level are the first auto-calibrated digital levels on the market. The levels, which are available in magnetic and nonmagnetic models, have seven measuring display modes, an audio indicator that outputs a continuous tone when in level, a hold function that allows the user to lock measurements, a top-read digital display, and a tilt indicator. The levels range in price from $100 to $200, depending on the model.