High 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. How to Use: Speed controller programming instructions. 1. Enter the PROM, connect the throttle on the emitter using the simple option M, and move the throttle rod to the full throttle position without moving it. 2. Connect the battery, program initialization after the 3 seconds, the controller will start to beep, after completion, move the throttle lever to the lowest position. Specification: Item Type: 4 in 1 45A ESC 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 Package List: 1 x ESC 3 x Wiring 1 x Capacitance 1 x Plug 8 x Rubber Mat 1 x Wiring Diagram