The PIZA 25 bench scale is NSF Certified and includes a foot pedal that operates as the "Zero" key. It has a 12.4" x 12.7" platform that is great for weighing food items or general weighing. The stainless steel platform allows for easy cleanup. The foot pedal "zero" key allows the user to zero the scale without pressing the keypad on the weight display. This lowers the risk of contamination in environments were food safety is important. For continuous use the Tree can be powered by the included AC power adapter or for portable applications use 6 AA batteries (not included). The 5 button keypad keeps operation of the scale simple. It has a dedicated "Hold" key that allows the user to keep a weight displayed until the user presses the "Hold" key again. The LCD back-lit weight display is not directly mounted onto the scale platform.