Gardner Bender Sperry Voltage Tester Kit Voltage tester kit to verify the presence of AC alternating current voltage prior to working on any application. Audible and 360 visual indication. Patented battery self-test feature. Frequency of 50 to 60 hertz, not adjustable. CAT rating III 1000V volts , IV 600V. Tests standard and GFCI ground fault circuit interrupter outlets. Neon lamps indicate 7 common wiring errors. Wiring errors legend is listed on top and bottom of tester. Compact, ergonomic design with over-molded rubber grips and pocket clip. Type Non-Contact, AC Voltage 50 to 1000VAC, Power Source 1 AAA Battery, UL Listed Yes, ETL Listed No, Pkg Qty 1, Package Type Clamshell WARNING This product can expose you to chemicals including DEHP which is known to the state of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov