Unit was purchased as a successor for DLE 50 (laser rangefinder to 50 m); Experience: 1. Both devices are ideally suited for the handyman. 2. Prices for the "blue professional series" are about Amazon comparable to the much simpler "green series" in the hardware stores! 3. Who 50m max. Distance enough should buy the DLE 50, the keys can be operated much better. When DLE 70 are apparently protected against water and "tricky" to operate. 4. A small advantage from DLE70 is the prey is small spirit level. 5. DLE 50 and 70 are professional for the handyman units pack!