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Wolf Icon X1 Bite Alarm
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Nash Siren R4 Bite Alarm
Nash's flagship alarm, built around speed-responsive sensing, with a USB-C rechargeable receiver rated beyond 750 m.
Check price on Amazon- Sensing
- Speed and wave sensing
- Brand
- Nash
- Alarm power
- 2 x AAA (stockist listing)
- Receiver and range
- R4 receiver, over 750 m
- Reference
- T2980
The Siren R4 builds on the speed-responsive indication of Nash's Siren R3. Nash's aim is to screen out "non-events" such as wind, undertow and waves while still registering a genuine take, using what it calls Intelligent Sensing. The R4 is sold as a single head (T2980) and in 2, 3 and 4 rod presentation sets with the R4 receiver.
Technical specifications
| Specification | Siren R4 alarm |
|---|---|
| Sensing | Speed-responsive sensing with Nash's speed and wave sensing modes |
| Sensitivity | Five settings |
| Tone and volume | Eight settings; falling-tone drop-back signal |
| LEDs | Red, blue, white, green or purple; two brightness settings; pulsing and wrap-around LED |
| Mute | Three muting configurations |
| Indicator connector | MMCX bayonet for Nash Night Glo indicators; converter supplied for Slap Heads and bobbins |
| Power | 2 x AAA batteries (not supplied), per Angling Direct's listing; low battery warning |
| Build | Weather-resistant soft-touch body; removable rubberised snag ears; thread compression collar |
| Boat fishing | Homecoming Mode lights a rear LED as a guide back to your swim |
| Warranty | Two-year extended warranty on registered Siren alarms |
R4 receiver
| Specification | R4 receiver |
|---|---|
| Range | Over 750 m, subject to conditions (maker's claim) |
| Power | USB-C rechargeable; about 4 hours for a full charge; guide run time around 20 weeks between charges |
| Pairing | 4 channels for single R4 alarms, plus a buddy channel for up to 32 more |
| Alerts | Matches each alarm's tone and LED colour; mute, vibrate or LED-only modes; anti-theft alarm |
| Model | T2981 |
Who it suits
Anglers who fish big, windswept waters, from boats, or abroad, where waves and undertow cause constant false bleeps on simpler alarms. The receiver's range and buddy channel suit long sessions and group trips.
Worth knowing
- Some review sites list a CR2 battery for the R4 head; Angling Direct's listing says 2 x AAA. Check the manual that comes with your alarm.
- Read our explainer on speed and wave sensing to understand what the settings do.
Specifications checked against the maker's and UK stockists' published details in November 2026. Makers update products without notice, so confirm anything critical with the retailer before you buy. Spotted a change? Let us know.
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