Steam-RC Rechargeable Helicopter Pitch Ruler Metal Pitch Gauge Degree Angle for 200- 800 RC Helicopter Description: Steam-RC Metal Pitch Ruler is with charging function, no need to worry about battery failure in use, with Type-C charging cable, can provide power for the product at any time. It is suitable for measuring the Angle of helicopter rotor with root thickness of 5mm/8mm/10mm/12mm/14mm. First place the metal pitch ruler on the relatively flat part of the motor or helicopter, press the ABS/REF key to clear the Angle to zero. Then the Angle value obtained by installing the metal pitch ruler on the rotor is the pitch Angle. Specification: 1. Size:87.5×58.5×14mm 2. Working temperature:0-50℃ 3. Weight:100g 4. Built in backlight, available at night 5. Detection Angle:±90 degree 6. Automatic flip screen function(Inner three axis gyro) 7. Equipped with relative measurement REF and absolute measurement ABS conversion 8. Data lock HOLD for reading 9. Shut automatically after three mins on the alert status Operation guide: 1. ON/OFF button is turn on/turn off. (Long press for three seconds) (HOT100019 is displayed as an absolute horizontal angle when turned on) 2. ABS/REF key, place the instrument on a horizontal platform, briefly press this key, the value will return to zero, and the LCD display(REF) will display 0.0°. The measured angle value is the relative horizontal angle value. Short press the button again, and the LCD display (ABS) will display absolute horizontal angle. 3. Hold/LSV key, short press to lock the angle/long press for three seconds to switch to slope measurement. Package Included: HOT100019×1 USB Charging cable×1