Coming from Tekin is the new RX4 rock racing and rock crawling brushless electronic speed controller. The waterproof speedo offers features such as a high-voltage BEC, widely adjustable brake settings, data logging and it can also drive brushed motors. The HotWire PC interface allows for advanced programming and updating and gold-plated solder posts make for easy wire replacing. The controller measures 40.6×50.8×35.5mm, it weighs in at 75.5g and it is usable with 2S to 4S LiPo batteries.