Features: Handheld rangefinder, supports distance measurement, speed measurement, flagpole lock and fog mode, more practical. Using high-clear optical lenses, high-performance optics produce clear picture, freshing and bright, with low distortion. High-performance technical support, stable measurement data, high-quality and not easy to wear, and long service time. Small and portable, it can be grasped in one hand, ergonomic, more suitable for hand, and the measurement is simple and convenient. It is suitable for camping, mountaineering, golfs courses, electrical surveys, building construction surveys, etc. Specifications: Material: ABS Speed Measurement Range: 0-300KM/H Power: 2 * AAA Battery Working Temperature: -10-40