Handheld 2‑9 Leaf LED Propeller Speed Tester For RC Drone Recommended

Feature: \n 1. Made of high quality plastic and electronic components material, sturdy, durable and long service life.\n2. Small error and high accuracy. Suitable for RC airplane, duct, propeller speed test of propeller.\n3. With a lanyard, it is light and easy to carry. It can be hung on a hook or a shelf without taking up space.\n4. It is easy to use, just turn on the switch, select the number of propeller blades, and aim at the rotating propeller at a distance of about 5~10cm to start reading.\n5. The LED display reading is clearer, and the screen will display the maximum measured value with a blue backlight for easy reading. \n\nSpecification: \n\nItem Type: Led Handheld Tachometer\nWorking Method: Photoelectric\nHighest Reading: 99999\nDisplay Mode: LED\nNumber of Test Leaves: 2-9\nAutomatic Shutdown: 1 Min\nWeight: Approx.69g/2.4oz\nMaterial: Plastic + Electronic Components\nBattery: 1 x CR2032 220mAh Replaceable Lithium Battery (Main Unit with Supporting Built-in Battery)\nApp: