Enhance your propeller speed measurement with this advanced LED Handheld Tachometer, specially designed for accurate and convenient testing of drone and RC airplane propeller speeds. Featuring a clear blue backlit display, this digital tachometer provides easy readability of maximum measured values even in low-light conditions, ensuring precise monitoring in all environments. Key Features: · Bright Blue Backlit LED Display: Offers high visibility of maximum RPM readings, making it effortless to read measurements during use. · Easy Operation: Simply turn on the device, select the number of propeller blades from 2 to 9, and aim the tachometer at the rotating propeller within a distance of approximately 2 to 3.9 inches to begin accurate measurement. · High Accuracy & Wide Range: Designed to deliver precise results with minimal error, capable of measuring speeds up to 99,999 RPM, perfect for RC airplanes, drones, and duct propeller speed testing. · Durable Construction: Made from premium ABS material combined with quality electronic components to ensure long-lasting durability and reliable performance. · Lightweight & Portable with Lanyard: Includes a convenient lanyard for easy carrying and storage, allowing you to hang it on hooks or shelves, making it highly portable for field use. · Automatic Shutdown: Features an energy-saving automatic power-off function that activates after 1 minute of no signal detection, prolonging battery life. Specifications: · Item Type: LED Handheld Tachometer · Material: ABS · Application: Suitable for Drone and RC Propeller Speed Testing · Battery: CR2032 x 1 (220mAh) (Inbuilt) · Working Mode: Photoelectric · Highest Reading: 99,999 RPM · Display Mode: LED · Number of Propeller Blades: 2 to 9 · Backlight Color: Blue · Automatic Shutdown: 1 Minute Without Signal Package Includes: · 1 x LED Handheld Tachometer with Lanyard This LED Handheld Tachometer is the ideal tool for hobbyists and professionals seeking a reliable, accurate, and easy-to-use device for measuring propeller speeds. Its durable build, clear display, and user-friendly features make it indispensable for efficient drone and RC airplane maintenance and testing.