Tarot ZYX-S2 is the newest version of gyro from the tarot company, it uses new MEMS angular rate sensor and 32-bit microprocessor, new control algorithms and computer setup software, greatly enhance the spin stability , vibration resistance and flight performance. Suitable for all 200-800 size fuel or electric helicopters. Built-in supply voltage detection function, to ensure flight safety. Providing free firmware upgrade. Setup process is very easy, the whole process only takes 3 minutes.