USA Measurements weigh bars are built for portable applications. So, it can easily be moved to another location, and it can be easily stored when not being used. The digital weight indicator is operated by optional rechargeable battery (includes AC adapter/charger). The standard functions include lb, kg, oz, lb:oz, g, Tare, and Net/Gross. The indicator has a full duplex RS- 232 connection for output to a printer or computer. The indicator also features an animal motion hold. This special software allows you to obtain an accurate weight even if the animal keeps moving on the scale. All of our products come with free lifetime support. Features: