US Ship Hobbywing 5V/6V 3A Switch-mode UBEC, Max 5A Lowest RF Hobbywing 5.2-5.25V/5.85-6V 3A Switch Type UBEC, Max 5A switch-mode DC-DC regulator supplied with a 2-6 cells lithium battery pack Supplying a consistent safe voltage for your receiver, gyro and servos Input: 5.5V-26V Size: 43mm*17mm*7mm (L*W*H)