Right Tools. Real Value. Made Practical JEJIEFI was founded by engineers frustrated with the tool market. Too many products were either overpriced or uncomfortable to use. We decided to do better. Before selling any tool, we test it ourselves in real-world scenarios and select only what meets our standards. We also provide responsive support whenever questions arise. Our goal is simple: deliver practical, affordable tools that make work and everyday life easier. Is the voltage detection feature reliable? Can it identify both Live and Neutral wires? The voltage detection is reliable for identifying Live/Neutral wires. It supports both contact testing for accuracy and non-contact induction for AC live wires. Note: It only detects presence of voltage, not the specific value. Is this tool too heavy? Will it cause fatigue during long use? No. The tool weighs only 0.58 lb, making it lightweight. The balanced center of gravity and ergonomic grip reduce hand fatigue even during extended cutting, stripping, or crimping work. Is there a manual included? Are the 8-in-1 functions easy to learn? Yes. A manual is included, and functional zones are engraved on the tool—stripper, cutter, crimper, twister, puller, needle-nose gripping, and voltage tester. Most users learn all functions after a few uses. What safety precautions should I follow when using the voltage detection feature? 1. The nose is conductive—never touch it during high-voltage testing; 2. Do not touch both Live and Neutral wires at the same time to avoid short circuits.