Introduction: Developed by the R&D team in Align, the new AP800 digital pitch gauge is suitable for flybar and flybarless helicopters. Auto-detecting Horizontal level , with result displayed through high contrast LCD screen, providing a simple and precise way of measuring pitch angle. Fatures: Auto-detecting Horizontal level. Uses backlighting LCD monitor. Zero and Lock function. Detectable pitch range: -90° ~ 90°. Automatic screen rotation. Suitable for 200~800mm main blades. Build-in energy saving function. Power shuts down after 3 mins without any movement. Specifications: Body Dimension：108x53.9x16mm Suitable blade width：20mm~74mm Detectable pitch range: ±90° Resolution: 0.1° Battery: 2X CR 2032 Lithium Weight:38g (including battery)