KK2.1.5 PLUS Flight Controller Board with LCD Display, Integrated PDB and Buzzer Overview A compact, allinone flight control solution for custom RC aircraft and DIY FPV projects. The KK2.1.5 PLUS combines an onboard LCD for direct setup, an integrated power distribution board to reduce wiring, and a buzzer for audible alerts. It supports multirotor, fixedwing and VTOL configurations so one board can be used across a wide range of models. Key benefits Faster setup and tuning: Builtin LCD display and menu system let you configure and tune the controller on the bench or at the field without a computer. Cleaner builds and lower wiring complexity: Integrated power distribution board consolidates power wiring for motors and electronics, reducing installation time and failure points. Clear audible feedback: Buzzer provides arm, disarm and locate alerts so you can monitor aircraft status without visual confirmation. Versatile aircraft support: Native support for multirotor, fixedwing and VTOL platforms eliminates the need for multiple controllers for different airframes. Compact and durable: Lowprofile PCB design fits common frames and mounting locations while providing reliable electrical connections. What it does Primary flight stabilization for quads, hexacopters and other multirotors Flight control for fixedwing airplanes, including mixing for elevons and other control setups Support for VTOL transition modes to manage both vertical lift and forward flight Onboard menu and LCD for parameter adjustment, mode selection and calibration Compatibility Designed for RC drones, quadcopters, airplanes and DIY FPV projects Works with standard RC servos, ESCs and receivers commonly used in hobby builds Suitable for custom and hobby frames where compact integrated electronics simplify installation Physical and build notes Compact PCB form factor designed to fit inside common frames and mounts Integrated connectors and solder pads simplify wiring between motors, battery and peripherals Sturdy printed circuit board construction for hobby and field use Use scenarios Race quad build: Use the integrated PDB to reduce weight and wiring clutter, tune motor response and rates directly via the LCD before your first flight. FPV fixedwing conversion: Install on a trainer or sport plane to add onboard flight control and mixing, set control throws and monitor status through the LCD during ground checks. VTOL prototype: Manage multicopter hover and fixedwing forward flight with one controller, use the buzzer to confirm arm state during transitional testing. Why choose this board For hobbyists and DIY builders who need an adaptable controller that simplifies wiring and makes setup immediate and portable, this flight controller combines core functions needed for stable flight and fast field tuning. It is practical for a wide range of RC aircraft types and supports handson configuration without extra tools.