This is a replacement Hobbywing Xerun Super Capacitor Module, intended for use with the Xerun series ESC's. HobbyWing Capacitor Features: Super low impedance. Low temperature in working state. Reduces the RF interference to make the RC model more reliable. Improves the burst power when the motor starts to run. Spec Check: Capacity: 330uF*2, Voltage: 16V, Impedance: 0.002 ohm, Ripple Current Endurance: 24 Amp, Size: 29mm x 13mm x 13.2mm, Weight: 5g. Suitable for the XERUN and EZRUN series 1/10 scale ESC.