allsun GK13 Christmas Light Tester for Incandescent Strings, BulbsFuses

EFFORTLESS FAULT FINDER & BULB REMOVER' This Christmas light tester features non-contact AC voltage detection (12V-600V), allowing you to safely check for live wires. It includes a built-in, retractable bulb remover for easy extraction. EACH BULB MUST BE REMOVED and tested individually for precise results. This tool does NOT detect faulty bulbs while they are still installed in the string. , INSTANT AUDIBLE & VISUAL ALERT SYSTEM' Get clear, immediate fault confirmation with both an audible buzzer and visual LED alerts. This fuse and bulb tester quickly checks fuses (<4x10mm) and bulbs once removed, saving you from guesswork and helping you restore your lights in minutes. , PRECISION DETECTION WITH ADJUSTABLE SENSITIVITY' Fine-tune your detection with the sensitivity knob to minimize interference from other wires. This tester is designed for incandescent lights (string, mesh, icicle) and is NOT for LED Christmas lights, ensuring you buy the right tool. , QUICK-START BATTERY SETUP & PRO TIPS' Get started immediately with included 2x1. 5V LR44 batteries. Open the battery cover and check whether the battery insulation sheet. Ensure correct polarity installation. Remember to switch to "OFF" after use. As a pro tip, at lowest sensitivity, it can distinguish zero/live lines at 220V. Avoid intense electric fields to prevent false alarms. , MONEY-SAVING DIY REPAIR TOOL' Don't replace entire light sets. This essential repair tool helps you quickly find and replace faulty bulbs and fuses, extending the life of your lights and saving you money on holiday decorations. , RELIABLE & SAFE FOR HOME USE' Engineered for dependable indoor use in environments from 0C to 40C and under 85% relative humidity. Your go-to tool for safe and effective holiday light troubleshooting year after year.