The BulkSupplements pocket scale is a small, lightweight, and portable scale that can be used for a variety of purposes. It has four weighing modes (g, oz, gn, ct) and a tare function to subtract the weight of the container you're measuring from the total weight. The auto off feature turns the scale off after 60 seconds of inactivity to save battery life, and it can be used at normal room temperature. The backlit LCD screen is easy to read, and the scale platform is 2.5 in x 3 in. The scale requires 2 x AAA batteries (included), and it has an error code system to help with troubleshooting. It also has a calibration function, but calibration weights are not included. The flip-open protective cover helps keep the scale safe when not in use. This scale is not for trade purposes.