This is the Yokomo RS4D Drift Spec Brushless ESC Speed Controller. The RS4D is a full aluminum case ESC developed in cooperation with Yokomo's Takashiro. This ESC is great for 2WD and 4WD and features drift specific programming. In order to make it easier to control the drift angle during cornering, the throttle characteristics in the low speed range are set to mild, while the middle speed range has a little boost to produce powerful turning.
Changing the program settings can be done with the Yokomo Brushless Programmer (YOKBL-YBP4), sold separately. The ESC can also be remotely programmed using the smartphone application and Yokomo WiFi Module (YOKBL-WM).
Specifications: Motor Type:Sensored/ 4Pole Sensored Brushless Motor Limit:>5.5t (specification when using the fan) Operating Voltage:3.7-7.4V Forward/Brake/Reverse:Yes Full Aluminum Case/Heatsink:Yes Typ. Voltage Drop @20A per Phase:0.016V Rated Current per Phase:424A Plugged 30x30x10mm Fan:optional BEC Output:6V/7.4V Built-in DC Booster, Continuous Current of 3A BEC Ouput Short Protection:Yes "Boost 0" Mode:Yes Multi-frequencey system:Yes Power Wires:12 awg Case Size:32.9x34.6x21mm (without fan) Weight:50g (without cables and fan)