DUAL COLOR LIGHT & TUNGSTEN BULBAdding dual color light for circuit's signal, red light indicates positive polarity & green light indicates negative polarity. Also built-in tungsten bulb to illuminate the backside in dark work environments, where provides a bright and reliable light indication, guiding you through intricate electrical tasks to the source of the problem with ease. PREMIUM SPRING WIRE & ERGONOMIC DESIGNMaximum extended to 96 inch long enough spring wire increases flexibility and a wide measuring area when testing, anti-bending design of the tail wire makes no worry about bad contact of the line. Along with large size crocodile clip for easy one-hand operation, will definitely improve your working efficiency. SHARP PROBE & ANTI-LOST PROTECTIVE SLEEVELong sharp stainless steel probe for piercing insulation with ease, also for hard to reach tight areas. Integrated anti-lost protective sleeve to secure the probe during storage and safeguarding against damage, making sure no