This sale is for one (1) Home Science Tools brand precision digital balance scale Model BS-DB2000 High capacity digital science scale makes it easy to weigh out chemicals and more. It is easier faster to use than a mechanical balance, which greatly reduces your preparation and lab time. This precision digital scale has a 2000 g capacity with a very accurate 0.01 g sensitivity. It's ideal for most junior high high school science courses, including chemistry, that require precision measurements. 2000 g capacity 0.1 g sensitivity 0.1 g repeat-ability Pan size is 5" diameter Weighs in grams, ounces, troy-ounces, and pennyweight High-contrast display with backlight Automatic tare feature Simple keypad calibration Requires 2000 g calibration masses (2 are included with this sale that I purchased separately) Durable load-cell provides years of reliable use Powered by either 4 AA batteries or AC adapter that is not included AC Adapter input is 120 VAC at 60 Hz. Output is 6 VDC at 300 mA. (Home Science Tools does not carry this adapter) Locking cover protects the balance when not in use This scale is in very good ~ pre-owned condition (used 1 time) Please view photos for a good description of this item Thank you!