Stainless Steel housing for compatability with a wide fluids Factory calibrated for a true Plug and Play installation Battery operated so no additional power source is required Compact design provides the ability to install where space is limited Display shows flow rate, grand total and re-settable total The G2 family of meters is a compact, self-contained group of turbine meters that represent the ideal choice when accuracy and convenience are required for your application. The integral battery operated display provides flow rate, grand total and a re-settable total so you have the information you need at your fingertips. The factory calibration feature creates a true Plug and Play device. Installation is as easy a connecting your pipe and turning on the flow.