The Bluetooth SIG adopted Bluetooth High Data Throughput (HDT) on 4 November 2026. It raises Bluetooth LE’s top speed from 2 Mbps to 7.5 Mbps. For athletes, training files, maps, and music could move between watch and phone in a fraction of today’s time, using less battery. None of this will reach the watch you own now, because HDT needs a new radio chip in both the watch and the phone.
What Bluetooth 7.0 HDT is
HDT is a tier inside Bluetooth LE and an optional feature of Bluetooth Core 7.0, so a product labelled “Bluetooth 7” may not have it. HDT uses the same channels as today’s Bluetooth but packs more data into each transmission, and it adds error correction so the faster signal stays reliable. The SIG’s technical overview has the full details.
How much faster is it?
HDT has five speeds. Every HDT radio must support 2, 3 and 4 Mbps, while 6 and 7.5 Mbps are optional. A watchmaker could therefore ship HDT with a top speed of 4 Mbps, which is double today’s maximum rather than nearly four times. That’s a raw radio rate, and real transfers will be slower once protocol overheads are included.
What more throughput means for athletes
- Lossless music to earbuds. This is the first use the SIG is pushing, with products expected in 2027. Lossless Bluetooth audio exists today only through Qualcomm’s proprietary aptX Lossless, which needs a phone and earbuds that both support it. Sony LDAC carries high-resolution audio but is lossy. Even then, the current standard pushes throughput to the maximum; there is no room left to improve it. HDT makes lossless audio part of the Bluetooth standard and becomes relatively easy to achieve even at 2Mbps. A watch with onboard music could use the same link to stream full-quality files to earbuds without a phone.
- Faster syncs. Bluetooth chipmaker Nordic Semiconductor gives the example of a smartwatch syncing hours of sensor-rich training data to a phone in seconds. This makes the smartphone link for post-workout sync more viable and even preferable to Wi-Fi transfers.
- Maps, music and firmware. Transfers that now wait for Wi-Fi could run over Bluetooth at more-than-acceptable rates.
- Battery. The radio finishes each transfer sooner and spends longer asleep, which the SIG says improves energy efficiency. Real battery savings will depend on how each brand uses it.
- Reliability. Large transfers are split into blocks that are each checked separately, so a dropout means resending only the damaged blocks rather than the whole file.
What HDT won’t change
Heart-rate straps, power meters and footpods send small amounts of data, so HDT does nothing for them, and no sensor gets more accurate. The SIG claims no extra range. The first version of HDT doesn’t handle advertising, which is how devices find each other, so pairing works the same way it does now.
Quick answers
Is Bluetooth 7 the same as Bluetooth HDT?
No. HDT is an optional feature of Bluetooth Core 7.0, so a device can carry the Bluetooth 7 label without supporting HDT.
Will a firmware update add HDT to my watch?
No. HDT needs a new radio chip, so only watches built with HDT hardware will support it.
Do I need a new phone for HDT?
Yes. Both devices must support HDT. Otherwise, they connect over standard Bluetooth LE.
Does Bluetooth HDT improve range?
The Bluetooth SIG doesn’t claim extra range. HDT is designed for faster, more efficient and more reliable data transfer.
Will HDT help my heart-rate strap or power meter?
No. Sensors send small amounts of data, which today’s Bluetooth already handles easily.
Why your current watch won’t get it
HDT needs new radio hardware, so no firmware update can add it. The phone needs it too, because every connection starts on standard Bluetooth and switches to HDT only when both ends support it. Older sensors and phones will still work with an HDT watch at today’s speeds. Watch radios also change slowly: Garmin still fits a Bluetooth chip from 2017 to some new watches, so HDT may take years to reach budget models.
When to expect it
Intel, Nordic, Qualcomm, Samsung and Telink have backed the standard, and Telink says it is working with pilot customers. Qualcomm’s FastConnect 8800 phone chip already lists HDT support, so phones are likely to get it first. The SIG expects the first premium audio products in 2027.
When you shop for one, check that a watch advertised with Bluetooth 7 lists HDT specifically. Its specs should list support for 6 or 7.5 Mbps to get close to that fourfold speed.
Last Updated on 6 November 2026 by tfk the5krunner
Small things I always use
- Garmin 90-degree charging adapter: Charges your Garmin from any USB-C cable. Essential when travelling. I use one.
- Body Glide: The blue anti-chafe stick swimmers and runners carry. I use it.
- Speedo earplugs: Fewer ear infections and no cold-water dizziness. I use them.
- Dryrobe Advance: My winter changing robe for open-water swims. I use one. A cheaper option is the AONYIYI changing robe.
- Maurten: Race fuel that stays easy on the stomach. I use them.
- Beet It Sport nitrate shots: Beetroot shots I take in the days before a race. I use them.
- Garmin charging puck: The quickest way to top up before a session. I use one.
- Injinji: Toe socks that stop rubbing, so you run more. I use them.
- Ultimate toe protectors: Stop black toenails on long runs. They work. I use them.
- Compressport R2 v2 calf sleeves: My calf sleeves of choice. I use them.
- Cellucor C4: My pre-workout before hard sessions.
- TPU tubes: Schwalbe Aerothan, Tubolito and Pirelli SmarTube. Light, tiny spares. I use all three.
- G8 insoles: Adjustable insoles that are good. I use them.
- Cycplus Cube: A 97g electric pump that gets a road tyre rideable in two minutes. I carry one. 5% off with code THE5KRUNNER.
Watches and sensors
- Polar H10: My daily driver for waking HRV.
- Polar Verity Sense: My backup arm-worn HR sensor.
- Nomad bedside charger: Charges my iPhone and Apple Watch overnight. I use it, and many of their bands.
- Train.Red: The best muscle oxygen sensor I’ve used.
- Tymewear: Accurate heart rate and reliable ventilatory zones. I use it to pace endurance rides over an hour.
- Garmin Forerunner 970: A pro-grade triathlon watch. I use this.
- Apple Watch Ultra 4: My daily smartwatch. No phone needed on rides.
- Garmin Fenix 9 Pro: I’ve just bought one.
On the bike
- Continental GP5000 for everyday riding, and Aero 111 on the front for special occasions.
- Helmets: Specialized S-Works Evade 3 for road riding, and Rudy Project Wing for TT-style races. I use both.
- Ravemen FR300: A front light that mounts under your Garmin or Wahoo. I use one.
- Ravemen FR1000: The light and the computer mount in one unit, so nothing else goes on the bars. Better than mine.
- Ravemen FR1500SE: 1,500 lumens hanging under your Garmin, for proper night rides.
- Ravemen FR1100SE: 1,100 lumens under your Garmin, and up to 46 hours on slow flash.
- Ravemen FR500: A brighter FR300 with the same mount.
- Wahoo TRACKR Radar: I use it on one bike and Varia on the other. They perform the same.
- Garmin Varia RTL515: Radar that warns you of cars from behind. I use this model.
- Wahoo ELEMNT Roam 3: The bike computer that’s easy to use. I use mine on most rides.
- Favero Assioma Pro RS2: Accurate power pedals that swap easily between bikes. I use this model.
Home and indoor training
- NPE Runn: Makes my basic treadmill smart, sending more accurate speed and distance to my watch and Zwift. I use it.
- Google Wifi: Keeps Zwift connected in my pain cave. I use it.
- Apple TV 4K: Zwift on the big screen. I use two.
- Google Nest Doorbell (wired, 2nd gen): My video doorbell, running in both Google Home and Apple Home. I use it.
Health, recovery and sleep
- FreeStyle Libre 3 Plus: Shows how my blood sugar responds to diet.
- hDrop: Measures my sweat loss in summer and indoors.
- Fourth Frontier Zone: Checks my heart under load in hard sessions.
- Kineon MOVE+: Red and infrared light for sore knees, Achilles and other joints after hard training. I use it.
- Oura Ring 5: My partner’s recovery tracker of choice.
- Eight Sleep: A cooling mattress cover my partner and I use nightly.
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tfk is the founder and author of the5krunner, an independent endurance sports technology publication. With 20 years of hands-on testing of GPS watches and wearables, and competing in triathlons at an international age-group level, tfk provides in-depth expert analysis of fitness technology for serious athletes and endurance sport competitors. See the gear tfk uses. ID
