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HD 420 Digital Hearing Aid

 READY-TO-WEAR, no fitting or hearing test required.

 Fully programmable to match hearing test results.


The HD 420 – a fully automatic, behind-the-ear digital hearing aid

We are excited to introduce our new behind-the-ear digital hearing aid, the HD 420. Loaded with the latest digital technology, it’s designed to provide excellent sound quality, comfort and discretion to the wearer. Being automatic, it’s exceptionally simple to use, despite the complex nature of the technology. The volume control has been kept on a manual basis, leaving you firmly in the driving seat when it comes to controlling sound levels.

Why select the HD 420 from HearingDirect?

  • A chance to make a saving - given our competitive pricing. As we’re an on-line company, we have significantly fewer overheads than those on the high street. It means any savings we make can be passed on to our customers.
  • An easy delivery service - means you can order your hearing aid today either via our Customer Care Help Line, or the Internet and your device will be delivered to your door within a few days.
  • Free professional advice - is available when buying one of our hearing aids. We have a team of qualified hearing aid audiologists on standby to answer any questions you may have concerning hearing requirements, performance related issues or fitting enquiries. All you have to do is ask.
  • Hearing aids are pre-programmed - to assume a high-frequency requirement most commonly linked to age related hearing loss. They can however be altered to meet your specific needs. All you need to do is send us your most recent audiogram to audiology@hearingdirect.com and we will re-set it accordingly.
  • A 30-day money back guarantee - means you can return the product and receive a full refund if you’re not completely satisfied with the purchase.

What makes the HD 420 so special?

First of all, the HD 420 offers every feature you could possibly need to make your hearing as clear and natural as possible. Kiss goodbye to those days when you entered a crowded room and failed to make out what was being said in front of you. With speech enhancement technology and dual adaptive microphones, you can focus on a conversation while the premier noise reduction feature melts away unwanted background sound. With Hydro-guard, the device is water and dirt resistant, extending the life of the device and making it easier to clean. Being automatic, there is no need to make fiddly adjustments. It’ll all happen seamlessly, which is perfect if you like to keep things simple.


Key Features:

  • Behind-the-ear digital hearing aid
  • Hydro-guard – means it is water and dirt resistant
  • Contemporary, sleek design
  • Manual volume control
  • Adaptive noise reduction – to dampen down confusing background noise.
  • Multi-memory – to easily customize your device to fit with your listening needs.
  • Dual directional microphones – to help you focus on speech
  • Feedback reduction shield – helps to filter unwanted whistling
  • Tele-coil compatible
  • Dynamic speech enhancement – making speech clearer
  • Uses a size 312 battery such as the HearingDirect Batteries size 312
  • Low battery warning indicator
  • 8 sound processing channels
  • 30-day money back guarantee
  • 12 months manufacturers warranty


To summarize:

When it comes to first-rate hearing aids, it doesn’t get much better than the HD 420. It’s such a great all rounder. A sleek, contemporary design makes it inconspicuous and comfortable to wear. Jammed full of ground breaking hearing technology, the sound it produces is excellent and can make a real difference to your everyday life. It’s simple to operate and above all, comes at an exceptional price.

This neat behind-the-ear hearing aid comes with a 30-day money back guarantee and a twelve-month manufacturers warranty. Why not try it out for yourself? For more information on how to care for your hearing aid, you can watch our on-line video.

Customer Reviews

  1. Upgrade from the HD 350

    by Frank Loftus on 21/02/2018

    Had the HD350 for several years , they started failing so decided to get new aids choose the HD 420 ,very pleased the "new sounds I can now hear" ( I know they have always been there really) very pleased with these .
    Star Rating
  2. Purchase here for the great service

    by Michael on 24/06/2017

    So I upgraded from an in the ear model and this model is much better at picking up sound from more directions. Clarity is good.But the reason to buy here is the service! They are very accommodating to your needs and the process has always been customer focused. Joan is great!
    Star Rating
  3. So happy

    by L Waterfield on 1/06/2017

    Joan, my hearing aids are working out perfect. I even like the tips that were already on them. Haven't tried putting the tulip tips on them. I love having a volume again.
    Thank you so much for you help and programming my aids for me.
    So happy.
    Star Rating
  4. A really good buy

    by sheila wylde on 23/12/2016

    I upgraded from a HD 350 . What a difference ! The audiologist advised me to have the HD 420 after a lengthy discussion on the telephone . The volume control lets me adjust it to suit different situations and the noise reduction programme is very effective . The sound quality is superb , I'm glad I upgraded it has made a real difference .
    Star Rating
  5. Your choice for clarity in noise! More control than audiologists want you to have

    by Can You Hear Me NOW?! on 26/08/2016

    Not just good.....the best hearing aid I have ever (20 Years!) owned. I have tried alot, but this is amazing. I hear everything, but the volume control makes it easy to change for MY liking. I never seem to get programmed to the volume that is right for me - so I like being in control. It's a pretty small szie compared to many I have owned and really does a great job in noise which is a benefit I wasn't expecting.
    Star Rating

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