This item adopts the microcomputer (CPU) technique and junction laser technique for one instrument which combines Photo Tach (RPM) and Contact Tach (RPM, m/min). _x000D_ _x000D_ _x000D_ Features: _x000D_ 1. Adopting advanced technologies to achieve contact or non-contact measurement of rotation speed and line speed. _x000D_ 2. Speed sensor with groove measures speed and length of wire, cable and rope conveniently. _x000D_ 3. Automatically store max value, min value and the last measurement value. _x000D_ 4. Contact accessory and photoelectric accessory can be converted mutually at any time to achieve multi-purpose use. _x000D_ 5. Automatically prompt when the voltage of power supply is lower than the specified value. _x000D_ 6. Large LCD screen for clear reading. _x000D_ 7. Wide measurement range and high resolution. _x000D_ _x000D_ Specification: _x000D_ Model: SM6236E _x000D_ Measuring Range: _x000D_ Photoelectric Tach: 2.5 ~ 99999RPM _x000D_ Contact Tach: 0.5 ~ 19999RPM _x000D_ Contact Line Speed: 0.05 ~ 1999.9m/min _x000D_ Resolution: _x000D_ Photoelectric Tach: 0.1RPM (2.5 ~ 999.9RPM), 1RPM(over 1000RPM) _x000D_ Contact Tach: 0.1RPM(0.5 ~ 999.9RPM), 1RPM(over 1,000RPM) _x000D_ Contact Line Speed: 0.01m/min(0.05 ~ 99.99m/min), 0.1m/min(over 100m/min) _x000D_ Display: 5 digits 18mm backlight LCD _x000D_ Accuracy: (0.05%+1 digit) _x000D_ Sampling Time: 0.5 sec(over 60RPM) _x000D_ Range Selection: Auto-Ranging _x000D_ Memory: Max. value, Min. value, Last value. 96 data storage _x000D_ Time Base: 6MHz Quartz Crystal _x000D_ Detecting Distance: 50 to 500mm (Laser) _x000D_ Battery: 3 x1.5V AA Batteries (NOT included) _x000D_ Power Consumption: about 50mA _x000D_ Color: Black _x000D_ Size (L*W*H): 21*7.4*3.7cm / 8.27*2.91*1.46in _x000D_ Weight: Approx. 436g/15.4oz _x000D_ _x000D_ Package list: _x000D_ 1 * Tachometer _x000D_ 1 * User Manual _x000D_ 3 * Reflective Paper _x000D_ 1 * Screw _x000D_ 4 * Tach Accessories _x000D_ 1 * Photoelectric Tach Head _x000D_ 1 * Storage Case _x000D_ _x000D_ Note: _x000D_ 1. Due to the difference between monitors and light effect, the pictures may not reflect the actual color of the item. _x000D_ 2. Please allow slight error due to manual measurement. Thanks for your understanding.