Features: Advanced Flight Control Equipped with advanced flight control technology, the KK2.1.5 KK2 Flight Controllers provides exceptional flying experience, supporting self leveling and acrobatic flights. Specifically for vertical take offs and landingVTOL andVtail aircraft, this flight Controllers ensures stability and flexibility in different flight occasion. Suitable for Enthusiasts Perfect for hobbyists who seek advanced flight control and customizable features. Wide Applications Suitable for model aircraft competitions, aerials photography projects, and showcasing flight skill. It ensures excellent flight control capabilities and stability. Explore Flight Control Whether you experienced pilot and technology savvyindividual, this flight Controllers allows you to explore flight control system and perform challenging maneuvers, addings excitement to your flying experiences. Specifications: Material:PCB Gyroscope: InvenSenseInc Accelerometer: Anologue DevicesInc Self balancing function: Yes Input voltage: 4.8-6.0V Signal from receiver: 1520us (5channels in total) Signalsent to electrical control : 1520us Firmware version: V119S1PRO Package Includes: 1x Flight Control Board note: Please allow 1mm errors due to manual measurement. Due to the differences between different monitors, the picture may not reflect the actual color.