With the Snap-on Digital Display Circuit Tester, No. EECT400, technicians can detect voltage, power, ground and circuit integrity with increased accuracy and ease. The EECT400 incorporates the DC voltage digital display of a multimeter instead of a dimming/brightening indicator light only. This feature provides a "no guess" voltage value of the circuit, which is especially useful in more demanding environments such as testing circuits in sunlight. The backlit LED also indicates red for "power" or green for "ground." The digital display circuit tester provides surge protected +0.3V accuracy from 3V to 19.99V, plus the computer-safe <10mA circuit draw allows for confident testing. The one-hand operation of the EECT400 allows technicians to have the other hand free to handle wires, replace a fuse or operate a switch.