Compared to the 1st Generation, we changed the Gyro to Bosch BMI160 which is smaller and more reliable compared to the MPU6000. (It can #39;t use the same firmware target as the 1st Generation HummingBird F4 1S.) We also changed the camera plug to have a JST 4 pin (OSD Signal, BeeSign signal, 5V, GND) so now you can either use BeeSign Control or BeeSign OSD (more explanation of the BeeSign is down below.) Also, we upgraded the propeller to the newest Azi Quad Blade 31mm Super balance Prop. Last but not least, we also optimized the layout and increase the high current layout trace to handle more power. Dry Weight 22g Camera Specs: 25mw VTX, non-switchable power Total weight with Goober canopy: ~4.9 gr. 120 FOV 700 TVL This Kit Includes: - 1x HummingBird F4 Pro 1S Brushless FC - 4x NBD Brushless 0802 Gold Motors - (18000kv) - 1x Mark2 VTX Cam w/ Black Goober Canopy (Rev.G 4Pin connector) - 1x Clear Brushless Cockroach Frame - 1x Set of NBD Azi Quad Blade 1mm Props FC Specification: STM-F411 MCU for the main controller (Preloaded with BetaFlight) Support 1S battery ONLY Current sensor onboard ESC-12A Per Motor Channel BB21 MCU BlHeliS Support DShot(150 300 600) Multishot Gyro-BMI160 Onboard Sideway RGB LED controlled by Betaflight Support BeeSign signal compatible with NBD VTX-Camera System Onboard Diversity SPI CC2500 Receiver(Frsky D8 D16, Futaba S-FHSS) MotorPlug JST1.0 NBD OSD(Betaflight OSD Compatible) 5V 1A Power support for external VTX Camera or Receiver. Weight: 3.77g include power cable and PH2.0 Plug Use Uart2 when connecting external RX Firmwares : https://github.com/newbeedrone/Hummingbird-F4-Pro/releases/