IN STOCK
Portable passive RF monitoring device ZARUBA A3
$1,499
- Free shipping over $99
- Ships today if ordered by 2 PM PST · California
- 30-day returns on unflown drones
Frequently Bought Together
Engineered for the long haul.
The ZARUBA A3 is a portable, tri-band RF scanner that picks up FPV drone video signals so you know what's flying nearby before it becomes a problem.It's the result of years of feedback from pros who use this gear on the job every day, in real conditions, not just on a bench.
How It Works
Every FPV drone beams a live video feed back to its pilot over radio — usually on 1.3 GHz, 3.3 GHz, or 5.8 GHz. The A3 scans all three bands at once, running a full sweep every 4–8 seconds. Catch a signal, and it lets you know right away with sound and light — and if the signal's strong enough, you'll actually see the video feed pop up on the built-in 3.5″ screen. That's a real confirmation, not just a beep telling you to guess.
Here's the big thing: the A3 only listens. It doesn't transmit, doesn't jam, doesn't mess with anyone's signal. It's a passive receiver, plain and simple. That means nobody can detect it's running, and — as long as you're following federal, state, and local rules — passive RF monitoring like this is generally legal to own and use in the US. That's a real difference from active jammers, which are a whole different (and much more restricted) category.
The housing is impact-resistant PETG, rated IP54, so dust and light rain aren't going to take it out of service. Two swappable 21700 Li-ion cells give you 6–8 hours of run time on a charge, and it juices back up over USB-C in about 4 hours — same cable you're already using for your phone or laptop. Under 1.5 lbs, so it's not dead weight on a long shift.
Detection range up to 2.5 miles, depending on the transmitting drone's power, terrain, and conditions.
Why Buy It Here:
- Works right out of the box. No setup, no guesswork — it's pre-calibrated and scanning within seconds of power-on.
- Ships fast, backed by real support. Order by 2 PM PST and it ships same day from California, with free shipping over $99 and 30-day returns.
- 100% legal peace of mind. It's fully passive — no jamming, no interference — so you can own and use it in the US without any legal gray area.
General
Dimensions (without antennas)
95 × 158 × 47 mm (3.74″ × 6.22″ × 1.85″)
Weight
Up to 650 g (1.4 lb)
Housing material
Impact-resistant PETG plastic
Ingress protection
IP54 — dust-protected, resistant to water splashes
Small screen
Service information (channels, histogram, voltage)
Large screen
3.5″ — display shows received compatible video for analysis
Max ambient (storage/sun)
+140 °F (+60 °C)
RF Performance
Architecture
Passive receiver (no RF emission); parallel high-speed autoscan
Band 1.3 GHz / 3.3 GHz / 5.8 GHz
900–1680 / 3060–3700 / 4990–6000 MHz — up to 4,000 m / 2.5 mi*
Full-range scan cycle
4–8 seconds
Band selection
Any combination of bands can be enabled or disabled
Sensitivity control
Manual (recommended 10–15%) or automatic, per band
False-alarm mitigation
Filtering of non-video interference; Channel blacklist
Scrambled signals
Inverted-video transmission supported (descrambler)
Antenna interface
3 × SMA female — supports higher-sensitivity antennas
Tuning modes
Autoscan (default); standard VRX mode with manual channel tuning
Power
Battery
2 × 21700 Li-ion cells (2S), 4500 mAh, 8.4 V max charge, 33.3 Wh
Runtime
6–8 hours of operation
Charging
USB Type-C fast charging, QC protocol required
Charge time
4 hours to full while operating
Voltage display
Real battery voltage is shown on the information screen
Low-battery behavior
Warning at 7.0 V; forced shutdown at 6.4 V
Customer reviews appear here.