Python RXF Combo Overview. Furitek Python RXF 40A/70A Integrated Brushless ESC and Receiver Combo with Kosmik Transmitter. The perfect 2-in-1 plug-and-play solution for your 1/24 and 1/18 micro rock crawlers where space is extremely limited! Features a Big BEC for power-hungry servos, FOC (Field-Orientated control technology) with super slow and ridiculously smooth throttle control and a CNC-machined water and dustproof case! This easy drop-in brushless conversion for most of micro crawlers eliminates the need for an external receiver unit to upgrade your rig with a brushless power system! In addition, this combo is compatible with stock FX118, FMS18 and Hobbyplus 1/18 transmitters and includes SCX24, JST and TRX-4M battery connectors, ensuring compatibility with the most popular platforms on the market! FOC (Field-Orientated control technology). Big BEC for power-hungry servos. CNC-machined water and dust proof case. Super slow and ridiculously smooth throttle control. Work with Brushed/Brushless motors (config via app, default is brushless). Real-time telemetry up to 10Hz. Easy on-the-fly programming via App on Android and iOS. Easy drop-in brushless conversion for most micro crawlers. Includes SCX24, JST and TRX-4M battery connectors. Compatible with stock FX118, FMS18 and Hobbyplus 1/18 transmitters. 5.5V-8.4V Switchable. 0.87x 1.5x 0.6 (22x38x15mm). (1) Python RXF ESC/RX. (1) Kosmik 4-CH Transmitter. (1) JST battery connector. (1) SCX24 battery connector. (1) TRX-4M battery connector. (1) Water proof power switch. (3) Servo Extension cable.