Vertex 5 handpiece only. Professional, ultrasonic hypsometer for quick and easy tree height and distance measurement. Measures distances up to 30m with a resolution of 0.01m and accuracy of 1% of better if calibrated. Measures heights up to 999m with a resolution of 0.1m and angles in degrees, Grads or %. 5000 data sets can now be stored internally in the built-in memory and saved as a CSV file. Bluetooth can be used to transfer data wirelessly to devices with Android, iOS or Windows. Use the free app Haglof Link to receive the data from the Vertex 5 and then share it via e-mail, Drop-box, iCloud, Google Drive or similar directly from the app. Basal area function can be used to determine the minimum diameter on the sample plot to be counted. Red dot hair cross sight for more precise measurements. Proven accuracy and reliability. Can be used in difficult terrain with thick vegetation. . Made in Sweden.