NZ Digital Scale RX-200 200 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: 200g x 0. 01g Units: g oz gn ct ozt dwt Scale Size: 142. 5 x 77. 5 x 23. 5mm Platform Size: 77 x 59mm 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