Features: The new a3 v2 powerful gyroscope and balance specially for aeromodelling fixed-wing, and multiple protocol serial receiver support allows more easily connecting to your receiver. This multiple protocol serial receiver support more convenient to connection with your receiver. Supports standard adjustment receivers,and multiple protocol digital serial receivers. 32-bit processor, high-precisions sensorings, perfect hardware design and stable new firmware version, providing more reliable performances.3 wing types and remote total sensibility control. Independent adjustment of aileron, elevations and direction sensibility. Specifications: Material: Plastic Size: about 43×27×14mm/1.34x1.06x0.55in Supported serial receiver protocols 6 flight mode: gyroscope off, normal stabilisation mode, attitude lock mode, angle mode, automatic balance mode and auto cranes mode Package Includes: 1Set Flight Control Gyroscope Balancing Apparatus note: Due to the problemsof lighting effects, there will be tolerances in product, please understand. Please allow 0-1cm error due to manual measurement