This product performs three tests with one installation! Tests
conventional or GFCI protected 120 VAC outlets for correct wiring,
GFCI protected outlets to insure against trip at 2 mA, and GFCI
protection to insure trip mechanism function at 5-milliamp level
(actual test level is 6.8 milliamp). Features high visibility lamps
and easy-to-read attached chart enable convenient usage. Size - 3:
x 1-3/8" x 1-3/8". Patent pending. Made in U.S.A.