The Accutome PachPen combines accuracy, portability, and comfort for both physician and patient with an ergonomic design and a Gentle Touch 2.5 milimeter probe. A 65MHz sampling probe guarantees precise measurements, while IOP Correction Calculation quickly converts IOP measurements. The PachPen is additionally equipped with Accutome’s Digital Signal Analysis, which eliminates non-perpendicular measurements on the cornea. Accurate - 65 MHz sampling probe ensures precise measurements. IOP Correction Calculation - Converts IOP measurements in seconds. Easy-to-use - Superior ergonomic design fits comfortably in any hand. Versatile - Helps to save time and ease you practice demands. Gentle Touch - 2.5 mm diameter probe tip ensures patient comfort No need to recharge - Long-lasting lithium battery will last approximately 15,000 readings. Lightweight - The PachPen weighs only 3.0 ounces (85 g.)