1Main Control Chip: EMF8BB21F16G main control chip, operating frequency up to 48MHz, 3 in 1 IC driver, imported high quality high frequency ceramic capacitor. High end PCB production process, pads are metalized edge cladding, so that you can avoid pads falling off when using. 3 ounces copper thick, six layers plate, greatly reduces heat, resulting in higher efficiency. 2High Performance 45A ESC: Integrated with 4pcs high performance 45A ESC, double hole spacing design. With such a high degree of integration, the volume is only general size with the traversing machine, and the installation and wiring will become very simple. This incredible size and volume is specially designed for the racing class traverser. 3Rich Functions: Using BLHeliS firmware, powerful performance, rich functions, and support a variety of ways to set the ESC parameters, or upgrade the ESC firmware (such as through the throttle signal cable, using other development boards, or using cleanflight or Betaflight firmware to set or upgrade the ESC). 4PWM Hardware Drive Motor: PWM hardware drive motor, low noise, more flowing throttle response. Damped Light technology and regenerative braking function make motor deceleration more sensitive and effective, and control more accurate. Active continuation technology, so that the battery recovery power, prolong the duration of navigation. 5Anti Interference and Quick Response: Support not only ordinary PWM throttle mode, Oneshot125, Oneshot42 and Multshot ultra high speed throttle signal, but also the latest dshot 150, 300, 600 digital throttle for anti interference and quick response. Input and output lines using soft silicone wire, very durable, and high temperature resistance, easy to weld. Item Type:4in145AESC Weight: Approx.46g / 1.6oz Material: Electronic Components Color: Black ESC Size: Approx.44 x 43mm / 1.73 x 1.69in Fixed Hole: Approx.20 x 20mm / 0.8 x 0.8in, Approx.30.5 x 30.5mm / 1.2 x 1.2in Fixed Aperture: M4 Working Voltage: 2-6s Maximum Continuous Operating Current: 45A Maximum Instantaneous Current: 50A Support: DSHOT150, 300, 600, PWM, Oneshot125, Oneshot42 And Multshot Software: BLHeliSuite Firmware Version: BL16.7 Application: Fit For Unmanned RC Drone And For FPV Traversing Machine, Etc 1 x ESC 3 x Wiring 1 x Capacitance 1 x Plug 8 x Rubber Mat 1 x Wiring Diagram