description sperry instruments hgt6520 stop shock ii gfci outlet circuit analyzer tester, detects low resistance, single led indication of wiring error, 1/ea the stop shock ii circuit analyzer makes it easy to test gfci receptacles and determine the appropriate wiring correction needed. this gfci tester uses advanced circuitry and a patent-pending proprietary design to precisely detect the required low resistance (less than 10ohms) on ground wire and provides a clear and easy-to understand single led readout indication for correct wiring or bad ground, open neutral, hot/gnd reverse, hot/nu reverse and open hot wiring errors without the need to memorize or decipher a dual-indication chart. the stop shock ii includes a gfci test function to test outlets wired in parallel to gfci circuits (bathroom, kitchen and outdoor receptacles require gfci protection). designed for the jobsite this tester features hi-impact abs housing with a 250 lb crush rating and the ability to withstand drops of up to 10 feet. backed by a lifetime warranty this tool will speed up the testing process and increase your productivity for years to come. california proposition 65 warning. view warning label features bright 360° viewable led indicator light single led provides immediate indication of the wiring error, no need for a chart to carry, memorize or interpret beeping audible indicator confirms test completion advanced ground testing circuitry precisely detects the required low resistance values hi-impact abs housing withstands a 10 ft drop and offers a 250 lb. crush rating limited lifetime warranty specifications ac voltage 120 ac voltage range & resolution 120 v acme tools brand name gardner bender acme tools part number hgt6520 application gfci outlet receptacle tester detects resistance on ground wire instantly and tests for bad ground, open neutral, hot/ground reversed, hot/neutral reversed and open hot wiring assembled weight (lbs) 0.25 battery quantity required 0 battery size no battery required california proposition 65 warning required yes case included no color / finish yellow/black country of origin china data hold no dc polarity indicator no dc voltage 0 digital display not required electronic no globaltradeitemnumber (gtin) 00032076921866 internal supplier part # hgt6520 internet product code (ipc) ee22f499e73 manufacturer warranty limited lifetime warranty material hi impact abs housing package contents 1 stop shock ii gfci outlet circuit analyzer package weight 0.1 package weight (lbs) 0.1 tester type receptacle tests continuity no upc 032076921866 visual / audio alert visual voltage compatibility ac only