1.For RC toys,planes,helicopter,car 2.High quality 3.Low price 20A Brushless ESCDimensions:9.3*25*57.8mmCurrent(A):20-25BEC :2A PWM:8KLi-Po :2-3Ni-Mh/Ni-cd :4-10Ni-MhConstant current 20A Max 25A <10s Li-Poly 2-3 cells; Ni-MH 4-10 cells Auto Detect Break On/Off; MAX RPM 20,000 with 2212 Motors Auto Low battery Slow down at 3.0V/cell Lipo, cut-off at 2.9V/cell Lipo