This is the Castle Creations Talon 25 ESC Quad Pack, (4).
Castle Creations’ four pack of 25 amp ESCs have been optimized for use in your Multi-Rotor or Quadcopter by utilizing three (3) ESCs without a BEC and one (1) with a BEC. Say goodbye to the hassle of disabling the BEC on three of the ESC; this package is made specifically to save you the headache. The lightweight design and small footprint makes it the perfect choice for smaller Multi-Rotors and Quads.
A 490 Hz refresh rate makes the Castle Creations QuadPack 25 the epitome of stability during all aspects of flight; from a simple hover to the most extreme maneuvers. Recommended for platforms running up to 6S LiPo and pulling up to 25 amps, your Quadcopter or Multi-Rotor platform will perform like before.
While pre-programmed for your Multi-Rotor, the QuadPack 25 offers industry-leading software functions and USB programming capability via Castle Link USB adapter should you'require them (Castle Link sold separately).
Castle Link USB adapter