The PS2500 AND PS3500 are inexpensive yet versatile, handheld power monitors. Both provide a complete solution for the process of performing power studies – from setup, to data gathering, to issuing a comprehensive final report. Both are excellent choices for power studies; the PS3500 offers more measurements and features that are accessible through the keypad. Note their contoured, rubberized grip that fits securely and comfortably in the hand. They are lightweight (only 1.1 lb.), compact and rugged, - ideal for field work!