Features: 1. This new digital pitch gauge offers simplicity, high accuracy and ultra fast pitch angle measurement. 2. Mini in size and lightweight, easy to carry. 3. Fit for usual blades of RC helicopter models. 4. The pitch gauge is powered by 2 button batteries (not included) and allows blades from 200 to 800 mm. 5. With hold function, low battery indicator, calibration function, auto rotating display, auto power-off function. Specification: Condition: 100% Brand New Material: Plastic Color: Black Size: Approx. 122 * 68 * 20mm / 4.8 * 2.68 * 0.79inch Weight: Approx. 77g Battery: 2 Button Batteries CR2032 3V (Lithium 210mAh) (Not Included) Current Consumption: Max. 3mA Operating Temperature: 0 to +40 Celsius Operating Voltage: 3V/DC (CR2032 x 2) Resolution: 0.1 Degree Package List: 1 * Digital Pitch Gauge (Batteries Not Included) 1 * Manual 1This new digital pitch gauge offers simplicity, high accuracy and ultra fast pitch angle measurement 2Mini in size and lightweight, easy to carry 3Fit for usual blades of RC helicopter models 4The pitch gauge is powered by 2 button batteries (not included) and allows blades from 200 to 800 mm 5With hold function, low battery indicator, calibration function, auto rotating display, auto power-off function