NZ Digital Scale HP-100 100g x 0.01gFeatures: Super contrast, backlight 2 x AAA batteries (Included) Full Tare Range Capacity Energy saving auto power off function (60 seconds off) Capacity: 100g x 0. 01g Units: g oz gn ct ozt dwt Scale Size: 130 x 65 x 15mm Platform Size: 85 x 54mm Calibration: Turn on the scale. Press and hold the [M] key until the LCD display "CAL" , release the [M] key. Press [M] key again, the display will show "CAL" followed by the required calibration weight