Quick Answer
The RadioMaster TX16S MK3 comes in two internal-module flavours: ELRS or M2 multi-protocol. We recommend ELRS for 95% of pilots. Both share the STM32H7 processor, 5-inch touchscreen, and EdgeTX 2.12. First setup takes 20 minutes: flash the latest EdgeTX, bind your ELRS receiver, then map your arm switch and rates. The MK3 MAX adds CNC gimbals and a larger battery for pilots who want premium stick precision.
ELRS or M2: The Decision We Make for Every Customer
Every TX16S MK3 that leaves our workshop has the ELRS module. Not the M2. This was not always the case. When multi-protocol radios dominated, we stocked the 4-in-1 version because half our customers flew FrSky receivers and needed CC2500 compatibility. Today, that demand has collapsed. ExpressLRS is the standard, and Oscar Liang confirmed the same trend: RadioMaster is moving away from multi-protocol modules entirely.
The M2 module still has a place if you fly vintage BNF models with proprietary receivers (FlySky AFHDS 2A, FrSky D16, Futaba SFHSS). But for anything built in the last three years, ELRS is faster, cheaper, and longer-range. An ELRS receiver costs under £12 and outperforms a £30 FrSky unit. The maths speaks for itself.
Here is the spec that matters: the ELRS version runs Gemini-X dual-band, transmitting on 2.4GHz and 868MHz (UK/EU) simultaneously through dual LR1121 transceivers at 1W. That is the same link technology TBS Crossfire charges a premium for, built into a radio that costs £179.99. The M2 version cannot do this. It tops out at single-band 2.4GHz multi-protocol with no ELRS capability unless you add an external module.
Standard MK3 vs MK3 MAX: Is the £90 Worth It?
The standard TX16S MK3 at £179.99 already includes the 1W Gemini-X ELRS module, STM32H7 chip, and Hall effect gimbals. The MK3 MAX at £269.99 adds a CNC-machined gimbal upgrade, larger battery, and premium finish. Both transmit on the same dual-band ELRS link. For most pilots, the standard is the sweet spot. We only recommend the MAX for long-range pilots who want the absolute best stick precision and fly multiple batteries per session without recharging.
First Boot: What We Configure Before It Leaves the Bench
Every TX16S MK3 ships with EdgeTX 2.12, but we always check for updates via USB before handing it to a customer. The STM32H7 processor means firmware updates work differently from older F4-based radios. Follow the EdgeTX manual for H7 flashing. Once booted, we configure three things:
1. Stick calibration. EdgeTX handles this in under a minute. Calibrate with gimbals centred, then full deflection on all axes. Skip this and your drone will drift.
2. ELRS binding. Power on the radio, navigate to the ELRS LUA script (pre-installed), and select your V2 or Gemini binding phrase. Your receiver needs the same phrase flashed via the ELRS configurator. We use a memorable phrase rather than the random hash. It makes troubleshooting easier when a customer calls.
3. Switch and rate mapping. We map the left slider to arm, a three-position switch to flight modes, and configure Betaflight rates to match the customer's flying style. Beginners get 400 degrees per second on Acro; freestyle pilots get 800+.
Who Should Still Buy a Pocket or Boxer Instead
The TX16S MK3 is a big radio. At 500g without battery, it is nearly twice the weight of a RadioMaster Pocket. If you only fly whoops in the living room, save £125 and get the Pocket ELRS. If you want a mid-size radio with Hall gimbals but without the 5-inch screen, the Boxer at £99.99 is the middle ground. The TX16S MK3 is for pilots who want every feature, the module bay for future expansion, and a screen large enough to configure without squinting.
FAQ
Q: Can I use the TX16S MK3 with my old FrSky receivers?
Only if you buy the M2 version. The ELRS version has no multi-protocol support. However, we recommend replacing old FrSky receivers with ELRS units. A £12 ELRS receiver will outperform a £30 FrSky R-XSR in range, latency, and telemetry.
Q: Does the standard TX16S MK3 support Gemini dual-band?
Yes. The ELRS version includes dual LR1121 transceivers running 2.4GHz and 868MHz simultaneously. You need a Gemini-compatible receiver (like the RadioMaster DBR4) to use both bands at once, but standard ELRS receivers work on 2.4GHz without issue. Worth knowing: UK Ofcom regulations under IR2030 cap 868MHz at 25mW for licence-free use, so the full 1W output only applies to the 2.4GHz band.
Q: How does the TX16S MK3 compare to the RadioMaster Boxer?
The TX16S MK3 has a larger 5-inch touchscreen, STM32H7 processor, more switches and sliders, and a JR module bay. The Boxer is smaller, lighter, and £80 cheaper. For most beginners, we suggest the Boxer. The TX16S MK3 is the upgrade path when you outgrow it.