This unit is packed with great features! A large, clear scale makes this by far the easiest to read refractometer that we carry. Other highlights include a Automatic Temperature Correction, a 0-30 Brix scale, ocular eyepiece for focusing, a locking calibration ring and a beefy rubber grip for easy and sure handling. Once you pick this refractometer up the first time, you'll understand how it's been constructed to live in the vineyard with you - this is the heftiest and sturdiest unit we carry. For the user who only wants to have to buy it once!