This bundle  includes  : R12i Receiver With 410-470 MHz Radio (No 3G) and 15cm Pole Extension Trimble R12i — a new angle of productivity. With Trimble ProPoint GNSS technology and new Trimble TIP tilt compensation The R12i delivers unmatched GNSS performance, speed and accuracy to boost your productivity like never before. With improved performance in challenging GNSS conditions and robust IMU-based tilt compensation that lets you forget about leveling the pole, you'll get more done faster than you thought possible. IMU-based tilt compensation Calibration-free Inertial Measurement Unit based tilt compensation with immunity to magnetic interference Reach hard to access points Easily obtain accurate measurements on obstructed points like building and property corners or utility inverts Stay out of harm's way Safely capture points in hazardous locations like the edge of an open excavation or on roadways Built-in automatic integrity monitoring Have total trust in your system with real-time IMU anomaly detection and alerts Watch the pole tip not the bubble On-screen stakeout instructions guide the pole tip directly to the design point. No need to repeatedly adjust the pole tip position and re-level the receiver when measuring points