[High Precision] Engineered for maximum precision and accuracy, ensuring low error rates and reliable results every time. ^^ [Fast & Accurate] Delivers instant, highly accurate readings with zero warm-up time. Easy to operate. ^^ [Dual Wavelength] Features stable single-mode 1310nm & 1550nm light sources for comprehensive testing. ^^ [Excellent Performance] Rugged build and stable operation guarantee long-lasting durability and consistent results. ^^ [Portable & Durable] Compact, lightweight, and drop-resistant design fits easily in pockets or bags.