Description : I use this in all of my planes, that I don't want to wreck/break. These are extremely reliable and an excellent economical choice for those wanting to learn to fly or use for FPV wing or plane and even for those who just likes a little assistance in flying. I highly recommend these. Every hobby part I sell, I have used myself and that is why I know these work great and back them with a 30 satisfaction guarantee. The unit comes with instructions that are pretty easy to follow. This is a plane saver. Which if you build planes like I do, all those man hours you put into your planes and scratch builds can easily last longer with this quality gyro. You can even install it into your store bought planes. Includes Instruction Item Name: A3 V2 flight controller Material: Metal Input Voltage: 5 to 7.4V Servo Travel: 1520 500s Gyroscope: 2000dps Accelerometer: 4g Operating Temp: -40~ 85 Size: 43 27mm Weight: 11g Features: - One-click Auto Hover - 4 Flight Modes: Normal, Auto-balance, Auto-hover and Gyro Off modes. - 3 Wing Types: Standard, Delta-wing (Flying-wing) and V-tail. - 3 working frequencies for servos: 50Hz, 125Hz and 250Hz - Separated gain adjustment for each flight mode. - Automatic stick centering. - HV (7.4) operating voltage supported. - Futaba S.Bus / S.Bus 2 supported. - Easy to use, extremely well-suited to beginners Package Included: 1x A3 V2 Flight Controller