Defender Luna 2.0 Attack Alarm review
Defender Luna 2.0 Personal Attack Alarm - Loud 125dB Siren with Strobe LED Light - Personal Safety Device For Women, Batteries Included - Police Accredited
By Tom Calder
This is a keyring-sized personal attack alarm, not a careline pendant: pull the pin or press the button and it lets out a genuinely startling 125dB siren with a flashing strobe, meant to draw attention and buy time to get away. There's no monthly fee, SIM or app — it's a buy-once, carry-anywhere device, but it plays no part in fall detection or 24/7 health monitoring.
- Best for
- Carrying in a bag, on a keyring or in a coat pocket as a low-cost personal safety deterrent when out and about — not for home fall or health monitoring.
- Skip it if
- You're buying for an older relative who needs automatic fall detection or a 24/7 monitored SOS line
as of 4 Nov 2026, 20:07 GMT · 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.We earn a commission if you buy through the retailer links on this page. It doesn't change our verdict. How we make money →
Researched, not used. We haven't used this product. This review is built from the maker's specifications, owner reports and our own sizing.
What we like
- Loud 125dB siren is genuinely attention-grabbing, with an LED strobe for extra visibility in the dark
- No subscription, SIM or app — nothing to set up, no ongoing cost
- Cheap and pocket/keyring-sized, with batteries included
Worth knowing
- No fall detection, monitoring service or automatic call for help — an entirely different job to a careline pendant
- Battery is a replaceable CR2032 coin-cell type, not rechargeable — the manufacturer's claimed 2-year battery life is unverified
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Who shouldn't buy this
You're buying for an older relative who needs automatic fall detection or a 24/7 monitored SOS line — this is a personal attack alarm for out-and-about safety, not a telecare pendant. For that, look at a monitored careline service (e.g. Careline365, LifeConnect24, or your local authority's telecare team), typically £15–25/month.
Key specs
| Connectivity | None |
| Fall detection | Not applicable |
| Monitoring | None |
| Battery / charging | 2 x CR2032 coin-cell batteries included |
This is a Researched review: we haven't used this product. We check 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 it isn't for. Commissions never change a rating.
If this isn’t the one
Best for An independent older adult who wants one simple, big-button phone with a one-touch way to ring family — not someone who needs automatic fall alerts.
as of 4 Nov 2026, 20:07 GMT · 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.
Best for A family happy to be the first responder — someone wants live GPS and automatic fall alerts sent straight to their own phone rather than a call centre.
as of 4 Nov 2026, 20:07 GMT · 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.
Best for Someone who wants a smartwatch-style alarm with live GPS tracking and a family monitoring app, and is prepared to pay an ongoing monthly service fee on top of the device.
as of 4 Nov 2026, 20:07 GMT · 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.Free alerts for your home
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