FrSky Tandem X18SE
The Tandem X18 series dual-band telemetry radios benefit from an enhanced ergonomic design with rounded and more comfortable hand grips, along with an improved case design to make the radio fully stable when standing. The radio includes easy-to-reach sliders and switches, 4 standard stick trims with additional 2 extra trims added to provide more flexibility with flight attitude adjustments while operating the radio. The X18 series include further enhancements with integrated flash storage which improves and simplifies storage operation and use, and the interior of the radio has been designed with space and weight in mind, while still keeping all ETHOS setting and control features for the pilot to enjoy.
 
Internal 900MHz/2.4GHz Dual-Band & External Module Bay
The TD dual-band RF system combines both the features and advantages of 900MHz and 2.4GHz RF together in one system. The TD features real simultaneous dual-band longrange control with telemetry that achieves reliable end-to-end 4ms latency while maintaining a robust and high-quality signal link. The entire range of TD, ACCESS & ACCST D16 receivers are supported. The built-in TANDEM RF System supports ACCESS and ACCST D16 protocols.

In addition, the Tandem X18 series radios include a rear Lite version module bay to offer more options to connect external devices. FrSky welcomes working compatibility with the 3rd party products with their own developed technology following FrSky verified 3rd party compatibility-testing program.
 
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Why We Recommend This
The X18SE is the special-edition entry into the X18 lineup — it carries features from the higher-tier X18S model in a more accessible package. Our recommendation for pilots who want the X18 platform's Tandem dual-band system with SE-specific feature additions over the base X18. FPV Builds RC provides U.S.-based product support, transmitter-setup assistance, and configuration guidance for FrSky radios purchased through our store.
Frequently Asked Questions:
Which receivers are compatible with the Tandem X18SE?
The X18SE works with all three FrSky receiver families: Tandem (TD) dual-band receivers (TDR10, TDR12, TD SR10, TD SR12, TD SR18) for best range using 2.4GHz and 900MHz simultaneously; ACCESS receivers (Archer Plus series); and ACCST D16 receivers for legacy compatibility (older units may need a firmware update). See the full receiver lineup: https://www.fpvbuildsrc.com/frsky-receivers
What is the difference between the X18SE, X18S, X18RS, and X18?
The X18SE (Special Edition) is a refined version of the X18S with improved ergonomics and a unique colorway. The X18S is the core dual-band Tandem flagship. The X18RS adds the TD-ISRM RS module for a dedicated 900MHz long-range mode on top of dual-band. The base X18 is the entry point to the X18 lineup. All share TD receiver compatibility and run ETHOS OS. Compare the family: https://www.fpvbuildsrc.com/frsky-transmitters
What firmware/OS does the X18SE run?
ETHOS OS — FrSky's color touchscreen operating system with OTA receiver firmware updates, telemetry widget support, and flexible mixer logic. Free updates via FrSky's firmware site.
Does the X18SE have an external module bay?
Yes — a full-size JR-compatible bay supports ELRS, R9M, and any JR-format RF module alongside the built-in Tandem system.
What tray and strap accessories fit the X18SE?
The CNC Metal Tray is compatible: https://www.fpvbuildsrc.com/product-page/frsky-cnc-metal-tray-for-tandem-x20-x20s-x18-series — and the Shoulder Strap: https://www.fpvbuildsrc.com/product-page/frsky-transmitter-shoulder-strap
Does the X18SE support FrID Remote ID for FAA compliance?
Yes. The FrSky FrID module satisfies FAA broadcast Remote ID requirements and is compatible with the X18SE: https://www.fpvbuildsrc.com/product-page/frsky-frid-remoteid-module-tailored-for-faa-compliance
Does FPV Builds RC offer support for X18SE setup?
Yes — U.S.-based FrSky dealer. We help with receiver pairing, binding, and ETHOS configuration. Contact us anytime.