⚠️ This is the upgraded version of the BMK B2 RDT Transmitter. While the output power and internal components are the same, the enclosure has been updated due to supply shortages.
The B3 transmitter is fully compatible with all 434MHz BMK Remote DT receivers. It delivers nine times more power than the original B1, providing excellent signal strength even in challenging field conditions.
Each unit comes with a unique transmission code and uses a built-in Lithium Polymer battery. During pairing, the code is saved by the receiver — so you can use a single transmitter with as many receivers as you like.
🔁 Reuse Your Old Code (B1/B2)
If you’re upgrading from a B1 or B2 transmitter, you can send me your existing code. I’ll program your B3 with the same ID, so you won’t need to rebind your receivers. You can use both transmitters interchangeably.
⏱️ Built-in Ring & Delay Button
The B3 includes a protective ring and a side-mounted delay button (Abad button) built into the case.
With compatible timers, each press of the button adds 30 seconds to your DT time. This makes it easy to adjust your settings on the field without touching the timer itself.
⚠️ Feature available on all BMK RCDT timers manufactured after 18 September 2023.
🔋 Battery & Charging
The internal battery supports around 10,000 DT operations on a full charge.
When the battery is low, you’ll hear a different tone and four extra beeps between transmissions. Even in this state, it should still support about 200 DTs — enough to finish the day.
To charge, simply use a standard USB-C cable (not included). A full charge takes around 1.5 hours, and the LED will switch off once charging is complete.
⚠️ For safety and longevity, store the battery below 80% charge. Avoid recharging if you’re not planning to fly again soon.
📦 What’s in the Box?
- 1 × BMK B3 Remote DT Transmitter
⚙️ Technical Specs
- Weight: 30g
- Dimensions: 110mm × 30mm × 20mm
- Battery Life: ~1.5 hours continuous use / approx. 10,000 DTs
- Low Battery Warning: Below 3.3V (flashing LED and alternating tones)
🛠️ Troubleshooting
-
LED flashing quickly with beeping:
The battery is low — please charge it. -
No response from transmitter:
It could be a battery or button issue. Try plugging in a USB-C cable and pressing the button. If it still doesn’t power on, it may be a faulty button. Contact me for support.