The iM-50 Series is the perfect entry-level site layout and survey tool offering reliability and flexibility without sacrificing cost or functionality. The sleek design is built tough, with a water and dustproof IP66 rating, integrated Bluetooth capability and an internal antenna ...The iM-50 Series is the perfect entry-level site layout and survey tool offering reliability and flexibility without sacrificing cost or functionality. The sleek design is built tough, with a water and dustproof IP66 rating, integrated Bluetooth capability and an internal antenna, enabling you to deliver measurements cable-free to your data controller, streamlining your equipment weight and workflow.