FrSky Tandem X20RS
TD-ISRM PRO RF PERFORMANCE
With solid performance based on the dual-band 900M/2.4G RF signal link with multiple operating combinations of RF modes, the FrSky Tandem X20RS is equipped with the TD-ISRM Pro built-in RF module capable of supporting multiple protocols (TD Tandem, TW Twin, ACCST and ACCESS), with the same RF capability as X20 Pro editions.
The TD-ISRM Pro RF module has the dual 2.4G TW RF mode and supports simultaneous activation of working under TW and ACCESS R9 modes with the same module. In this configuration, the TW receiver and ACCESS R9 receiver can be connected via the SBUS IN/OUT ports to achieve redundant backup. This RF signal connection solution makes use of three different RF links at the same time in RC applications. This further enhances the transmitters signal reliability, particularly in long-distance RC operations scenarios.
DIFFERENCES IN APPEARANCE & FUNCTIONAL INPUTS
The FrSky X20RS has changed from the original FrSky X20 design in appearance. The bottom hand grip adopts the overall design of the PRO version, eliminating the need for an additional grip cover, and allowing the lower portion to be fully grasped by the palm for a more comfortable and relaxed grip. Additionally, the Lite-type external module slot has been adjusted to provide a better fitting installation space for external modules of different shapes, making it more convenient.
The X20RS adds 2 extra trims, allowing for increased precision tuning during operation. The slider levers on both sides of the transmitter support adjusting the positioning of the center, catering to different users' habits and preferences. The primary input components, including trim caps, center-slider caps, and the knobs are all made from metal, offering rugged quality and enhanced durability for outdoor use.
UPGRADED ROBUST ANTENNA HANDLE & EXTERNAL LoRa ANTENNA CONNECTORS
The newly upgraded antenna handle provides better impact resistance helping the transmitter withstand the tough conditions of outdoor fields. The reinforced and thickened antenna casing provides better comfort and grip while not compromising the antenna's performance. The redesigned antenna can transmit signal data more effectively, providing pilots with a robust radio link with their aircraft.
The X20RS is also equipped with 2 external antenna connectors, which can be mounted with additional 2.4G and 900M antennas for enhancing the RF capabilities working under the LoRa modes, to achieve enhanced long-range control.
BUILT-IN MASS STORAGE & (RS) TEXT TO SPEECH FUNCTION
The X20RS has built-in 8GB flash storage for all radio storage needs with high data transmission speed. The TTS (Text-to-Speech) function can quickly convert typed English words into spoken speech, enabling the ETHOS system to generate audio alerts when specific functions are activated.
(RS) DUAL-SIDE HAPTIC GIMBAL FEEDBACK
The gimbal vibration feedback function can be easily enabled or disabled by setting a switch. The dual-sided Gimbal's vibration feedback can operate independently, allowing configuration to match distinct feedback preferences for various application scenarios.
EASY TRAVEL-ADJUSTABLE MC20R GIMBALS (with ANY DESIRED DEGREE BETWEEN 45° to 60°)
The MC20R Gimbals have an 8° rotatable panel and can be adjusted to any travel position between 45° and 60°. The angle can be directly adjusted using a 1.5mm hexagon screwdriver through the adjustment hole on the Gimbal Panel, eliminating the need to disassemble the radio casing.
Why We Recommend This
The X20RS is the long-range specialist in the Tandem lineup — MC20R CNC Hall gimbals and dual LoRa antenna connectors make it the top pick for large-scale aircraft, slope soaring, and any mission where maximum link distance matters. FPV Builds RC provides U.S.-based product support and configuration guidance for FrSky radios purchased through our store.
Frequently Asked Questions:
Which receivers are compatible with the Tandem X20RS?
The X20RS works with Tandem (TD) dual-band receivers (TDR10, TDR12, TD SR12, TD SR18) using both 2.4GHz and 900MHz simultaneously; ACCESS receivers (Archer Plus series); and ACCST D16 receivers for older gear. Browse the full lineup: https://www.fpvbuildsrc.com/frsky-receivers
What does the RS module add over the standard X20?
The X20RS uses the TD-ISRM Pro module — the same RF module as the X20 Pro — running simultaneous 2.4GHz + 900MHz dual-band Tandem operation. Both bands are always active at the same time. The X20RS also adds MC20R CNC Hall gimbals and dual external LoRa antenna connectors for extended long-range performance.
How does the X20RS compare to the X20S and X20 Pro?
The X20RS adds MC20R CNC Hall gimbals and dual LoRa antenna connectors over the X20S. The X20 Pro also features Hall-sensor gimbals (M20 series) — the key distinction is the MC20R CNC precision gimbals on the X20RS vs. M20 Hall gimbals on the X20 Pro. The X20R is the entry-level Tandem radio. See the full Tandem family: https://www.fpvbuildsrc.com/frsky-transmitters
What firmware/OS does the X20RS run?
ETHOS OS, FrSky's color touchscreen operating system. ETHOS supports OTA firmware updates for bound TD receivers, flexible mixer and telemetry widget setup, and regular FrSky firmware releases.
Can I use an external ELRS or third-party module with the X20RS?
Yes — the X20RS has a Lite-type external module slot. You can run any compatible Lite-format module alongside the built-in TD-ISRM Pro system. Note this is a Lite-type slot, not a full-size JR bay, so verify module compatibility before purchasing.
What accessories are compatible with the X20RS?
CNC Metal Tray: https://www.fpvbuildsrc.com/product-page/frsky-cnc-metal-tray-for-tandem-x20-x20s-x18-series | Shoulder Strap: https://www.fpvbuildsrc.com/product-page/frsky-transmitter-shoulder-strap
Does FPV Builds RC offer support for X20RS setup?
Absolutely. We're a U.S.-based FrSky dealer. Contact us for help with receiver pairing, binding, and ETHOS configuration.