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Baby & child.

30 September 2021

Best audio baby monitor buying guide

How much a Best Buy audio baby monitor will cost you, and the extra features it's worth splashing out on.
Andrew Laughlin
Baby monitor with baby in background

Audio-only baby monitors range from the very basic mains-powered to feature-rich battery-powered units. 

These baby monitors don't come with a fancy screen, so you won't be able to watch your baby sleeping.

However, if you get a decent audio monitor with clear sound and useful features, such as sound sensitive lights, then you can still have piece of mind while your baby sleeps. 

The key decisions about what model to go for will come down to what features are most important to you.

If you're considering buying a video baby monitor, make sure you check out our separate guide on how to buy the best video baby monitor.

Below you can see the highest scoring audio-only baby monitors that are currently on sale. Or, see all tested models in our baby monitors reviews

Top five audio monitors

  • 86%

    While it might not have all the fancy features you’ll get with other baby monitors, this cheap audio monitor does its job brilliantly. It has a whopping 17-hour battery life, excellent range and an easy-to-use design. If you’re after a simple, affordable monitor, this is a great option.

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  • 84%

    This Best Buy audio monitor has outstanding range, excellent battery life, and a simple design that’s easy to use. Plus, you get some handy features including a temperature display, sound-sensitive lights, and a night light that you can control remotely using the parent unit.

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  • 83%

    This audio monitor impressed across the board in our tests with its fantastic range, long-lasting battery and clear sound. It’s bursting with useful features including a night light, feeding timer, temperature sensor and two-way talk function. We think it offers fantastic value for money.

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  • 81%

    Although it falls short of being a Best Buy, this big-brand baby monitor is a great choice if you're after an audio-only model.

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  • 79%

    This model isn't a Best Buy, but it does offer a lot for the price you'll pay. If our Best Buys or higher scoring models don't suit you, this audio monitor could be worth considering.

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Table updated: September 2021.

Should I buy an audio monitor?

If you want extra piece of mind while your baby sleeps without splashing out too much, an audio baby monitor is a good choice. 

Make sure you choose one with clear sound so that you can easily tell if your baby is happily gurgling to his or herself or needs your attention. 

You should also choose a model with accurate, sound-sensitive lights, so it's easy to spot whether your baby needs you at times when you have to have the monitor sound switched down.

audio baby monitor

How much does an audio baby monitor cost?

Audio monitors are much cheaper than video baby monitors, and can start from less than £20 for a basic model. 

For a budget price, you get a basic but good quality audio baby monitor, with sound-sensitive lights and a two-way talk feature so you can talk back to your baby. 

If you're willing to splash out a bit more, you can opt for a top-of-the-range audio monitor packed with features, such as a temperature monitor, a night light and lullabies.

Spending more doesn't guarantee quality, however. The most expensive audio model we've tested - costing more than £100 - is also one of the worst we've seen. 

See the best baby monitors – we test the key baby monitor features to find out whether they're really worth it.

Mains-powered audio baby monitors

All baby monitors consist of a baby unit – also known as the nursery unit, as this part stays in the nursery. This transmits sound via radio waves to a parent unit – the part of the baby monitor that stays with you. 

Mains-powered baby monitors are the simplest and cheapest type available. They need a plug socket to work, making them less portable than other options.

Prices start at around £20 for a basic model.


  • Cheaper than other baby monitor models
  • Simple to use
  • Suitable for parents using a baby monitor at night, or when not moving around the house


  • Dependent on a plug socket – there's no backup if there's a power cut
  • Less versatile, as you can't move the monitor around

Best for: people looking for a basic, no-frills, budget baby monitor that doesn't need to be moved around the house or garden

sleeping baby

Battery or dual-powered audio baby monitors

You can also buy battery-powered baby monitors – dual-powered devices that allow you to swap between mains power and batteries. This type of monitor allows you to carry the parent unit around the house with you, or to plug it in when you're staying in one room.

Most have rechargeable batteries so you won’t need an endless stock of batteries to avoid running out.

Rechargeable baby monitors are usually at the pricier end of the scale.


  • Useful for parents who will be busy about the house or garden while their baby is asleep
  • Dual-power baby monitors offer more flexibility
  • Rechargeable models save you worrying about replacing batteries


  • More expensive than mains-powered baby monitors
  • Not worth the extra money, if you won't use the portable option regularly

Best for: parents who want to move their baby monitor around

What makes a Best Buy audio baby monitor?

audio baby monitor

The features you’ll find most useful will depend on how you will be using your monitor, but here's the ultimate wish list of those you could consider.

Just want to see the best baby monitors we've tested? Browse our baby monitor Best Buys.

  • Range A decent range is important if you want to be able to move about your house without losing signal. Our tests check that a baby monitor’s range fully covers different property sizes and types, crucial for its effectiveness. Don't always believe what you read on the box.
  • Sound-sensitive lights These are really useful if you want to have the sound down, when you're having dinner or watching TV, for example. Accurate lights mean you'll be able to tell when your baby really needs you so you don't leave him or her crying.
  • Battery life A decent battery life on the parent unit is a must. You don't want to be having to charge your unit every hour to make it last, or having to sit by a plug socket to use your monitor. Our tests record how long the batteries will last before they need recharging or changing.
  • Battery indicator This should give you adequate warning before the batteries run out. Some let you know well in advance, while other monitors will just cut out.
  • DECTor digital A digitally enhanced, cordless telecommunications (DECT) baby monitor has a microprocessor designed to ensure the only nursery sounds you can hear are those from your own nursery, not anyone else's. It also means interference is minimal.
  • Night light A light on the baby unit can be very useful for a child afraid of the dark or for you when you have to tend to your child in the middle of the night. Some parent units also feature a torch.
  • Room temperature display Some parents find this useful and appreciate the alerts that the monitor can give when temperature falls below or rises above the recommended range (between 16 and 20°C). Others may find this annoying after a while.
  • Talk-back communication This works like a walkie-talkie and lets you reassure your baby through the monitor without having to go back into the room. It's called two-way talk on some monitors.
  • Room temperature display Some parents find this useful and appreciate the alerts that the monitor can give when temperature falls below or rises above the recommended range (between 16 and 20°C).  
  • Lullabies A useful additional feature – playing lullabies to help soothe your little one to sleep. Be warned though, the music can get irritating.
  • Portable parent unit If you are going to be moving around the house regularly, it’s worth spending extra on a battery-powered parent unit that’s easily portable. It’s also worth making sure the parent unit takes rechargeable batteries.

Rechargeable battery best buys – find out which will save you money and won't let you down