The M12 Cordless LITHIUM-ION Fork Meter is a heavy duty True-RMS electrical tester for professional residential, commercial and industrial applications. Powered by the Milwaukee M12 REDLITHIUM battery, the 2207-21 is four tools in one providing current measurement, voltage measurement, voltage detection and task lighting. In addition, this new tool provides a wide 0.63 in. fork opening, high 200amp current range and a high contrast white-on-black display. Covered by Milwaukee 5-Year Warranty.