What do you actually get with an audio baby monitor under £30 in the UK?

What is in the box under £30?

Which? describes an audio monitor as two parts: a unit that stays with the baby and a parent unit you carry. The link is a local radio system — often branded DECT or "digital" — not your home Wi-Fi. There is no nursery picture and no phone app. That is the product, not a cut-down video set.

• A mains baby unit (sometimes battery as backup — read the box).
• A rechargeable or battery parent handset, often with a belt clip.
• A volume knob and, on many sets, sound-sensitive lights so you can mute the speaker and still see a cry.
• Pairing out of the box: the two units are meant to talk only to each other.

Which?'s 2021 features piece said audio Best Buys were available under £30, while the cheapest video Best Buy it cited then sat around £80. Its later buying guide still tests Hubble Listen as an audio, non-Wi-Fi set. Those are Which? category notes, not scores copied here.

What drops at this price?

Open-air range printed as 300 m or similar is a radio-lab figure. A UK terrace or a block of flats is walls, not a field. Which? tests range through rooms; the box claim is not that test.

What do high-street audio sets cost in 2026?

Argos is the easy UK check for this band. On 10 September 2026 its digital-audio shelf showed entry sets under £30 and one model sitting on the £30 line.

Those boxes match the "audio entry" job: hear the baby in another room, carry a handset, stay off Wi-Fi. They are not a substitute for the video-under-£100 round-up, which is a different MayTally page.

Audio, video or Wi-Fi: which job are you buying?

1. 1
   Write the job in one line "Hear a cry from the kitchen" is audio. "See the cot from the sofa" is a parent-unit screen. "See the cot from work" is Wi-Fi.
2. 2
   If the job is hearing only Stay in this price band. Check the box for talk-back and sound lights if you will mute the speaker with guests in.
3. 3
   If you also want a picture Budget as if you have left the under-£30 aisle. Which?'s own 2021 note put video Best Buys much higher.
4. 4
   If you want an app You are buying a smart camera, an account, and the NCSC password / update / UPnP work. That is not what £19–£30 audio is for.

Will a £20 audio set reach across a UK flat?

For a one-bed or a two-bed on one floor, a digital or DECT audio link is usually enough because the distance is short. Problems show up as crosstalk (you hear next door) or as a dead handset through a thick party wall — that is a radio problem, not a missing camera. If you already hear the neighbours on a cheap analogue unit, that is a different article.

Which? tests whether you can walk through rooms and into a garden before the signal dies. It does not publish those metre figures on the open buying-guide page. Use a shop returns window to walk your own hallway.

Which features does Which? say are worth checking?

Which?'s features article lists a stable parent unit, lullabies, a temperature sensor, sound-sensitive lights, and — separately — Wi-Fi if you want an app. On a sub-£30 audio box you can realistically look for lights, a clip, and whether talk-back is printed on the spec. Temperature and lullabies are the usual upgrades as the ticket moves toward £30 and above.

The Lullaby Trust's position still sits above the shopping list: monitors are not shown to prevent SIDS, and they do not replace room-sharing for the first six months.

In shortUnder £30 you are buying two radio bricks and a speaker. Video, apps and often a thermometer are not in the carton. Check today's Argos ticket, walk the hallway in the returns window, and do not read an open-air range as a flat.