ACR ResQLink 400 Personal Locator Beacon review
Hillwalkers, sailors and remote travellers who want a one-touch emergency beacon with no ongoing subscription to manage.
By Tom Calder · Price last checked 20 Sep 2026, 12:29 BST · price-tracked
A well-built, no-subscription safety net for genuine emergencies rather than day-to-day check-ins. It only sends one signal — help, here I am — so it suits people who want that simplicity and are prepared to register it, as UK law requires.
as of 20 Sep 2026, 12:29 BST · Details
Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on Amazon.co.uk at the time of purchase will apply to the purchase of this product.ⓘ As an Amazon Associate, PreparedBritain earns from qualifying purchases. We may earn a commission when you buy, or a fee when you request a quote, through our links — it never affects what we recommend. Amazon prices come from Amazon's own product data and show the date and time they were retrieved. Prices at other retailers are checked by us, less often. Prices and stock can change at any time, so always check the retailer's price before you buy.
- No subscription or ongoing cost — one purchase, then free registration
- GPS plus Galileo GNSS gets rescuers within roughly 100m, backed by a 121.5MHz homing signal
- Compact, buoyant and rated to run 24+ hours once activated, with strobe and infrared strobe for visibility
- One-way SOS only — no two-way messaging, check-in texts, or way to tell family you're safe but delayed
- Battery must be swapped by an ACR-approved centre every 5 years, which is an added cost most buyers forget to budget for
Who shouldn't buy this
you want to send routine check-in messages or let people track you on a route — that needs a two-way satellite messenger with an active subscription, not a PLB, which is emergency-only by design.
Key specs
| Service type | 406MHz PLB via Cospas-Sarsat satellite network |
| Subscription | None required |
| Battery life | 24+ hours continuous transmission once activated |
| SOS capability | Manual, one-way distress alert only |
Our rating is a considered spec-and-evidence verdict: we verify every specification against at least two independent sources, re-check the UK price on a schedule where we can track it automatically, and say plainly who a product isn't for. Commissions never change a rating. Read the full methodology →
Alternatives to consider
as of 20 Sep 2026, 12:29 BST · Details
Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on Amazon.co.uk at the time of purchase will apply to the purchase of this product.as of 20 Sep 2026, 12:29 BST · Details
Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on Amazon.co.uk at the time of purchase will apply to the purchase of this product.as of 20 Sep 2026, 12:29 BST · Details
Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on Amazon.co.uk at the time of purchase will apply to the purchase of this product.Want this cheaper?
Prices for 364 tracked products are refreshed daily — last sweep 20 September 2026. Leave your email and we'll tell you when it drops — nothing else.