The Leica DNA10 and DNA03 high-accuracy digital levels are ideal for repetitive level shots or long level runs. Measure quickly without mistakes or fatigue, save your data internally or to a PCMIA card, and transfer the data to your PC. We calibrate each instrument in our own service center before it ships. Remember, no matter how good or expensive your level is, if it's out of adjustment it won't shoot level! Try getting that service from your typical internet site or big-box store.