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Roberts RD21B(ECO4) Ecologic 4 DAB/FM RDS Digital Stereo Radio wth up to 150 Hours Battery Life - Black

4.2 out of 5 stars 556 customer reviews
| 38 answered questions

RRP: £90.00
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  • Up to 150 hours battery life, six batteries LR20/D size (not included)
  • FM/DAB wavebands, Up/down tuning buttons
  • Easy to read 16 x 2 character LCD display, headphone/Line out socket
  • 20 station presets, rotary tone and volume controls
  • Size : 295 x 165 x 115 (w x h x d), weight : 2 kg
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Roberts RD21B(ECO4) Ecologic 4 DAB/FM RDS Digital Stereo Radio wth up to 150 Hours Battery Life - Black
Customer Rating 4 out of 5 stars (556) 4 out of 5 stars (56) 4 out of 5 stars (206) 4 out of 5 stars (734)
Price £76.52 £85.00 £76.99 £66.09
Delivery FREE Delivery FREE Delivery FREE Delivery FREE Delivery
Sold by Amazon.co.uk Amazon.co.uk Amazon.co.uk Amazon.co.uk
Colour black Black grey black
Dimensions 18 cm x 9.5 cm x 30 cm 10.5 cm x 10.5 cm x 30 cm 18.3 cm x 9 cm x 26.2 cm 14 cm x 7 cm x 20.2 cm
Model Number RD21B(ECO4) ECO4BT EXPRESSION SOLARDAB2BK
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Product details

  • Product Dimensions: 9.5 x 30 x 18 cm
  • Boxed-product Weight: 2.4 Kg
  • Item model number: RD21B(ECO4)
  • ASIN: B000X5HGOK
  • Date first available at Amazon.co.uk: 1 Jan. 2006
  • Average Customer Review: 4.2 out of 5 stars  See all reviews (556 customer reviews)
  • Amazon Bestsellers Rank: 6,681 in Electronics (See Top 100 in Electronics)

Product Description

Product Description

The Ecologic 4 offers 150 hours battery life, which is five times more than other DAB radios on the market, so you'll need to purchase batteries less often. Alternatively the radio can be operated via the mains and has a reduced level of power consumption. Save money and the environment with the Ecologic 4. Available in contemporary black with blue backlight, it features stereo speakers as well as separate Bass and Treble controls which means the quality of produced sound is of an extremely high standard. Twenty station presets means you are never far away from your chosen or favourite radio station. Extremely portable owing to it's sturdy handle and battery operation this is one of the most popular digital radios on the market.

Technical Details

Up to 150 hours battery life
FM/DAB/DAB+ wavebands
FM RDS station name display
20 station presets
Easy to read 16 x 2 character LCD display
Menu display / selection of all major functions
Search / Manual tuning
Automatic clock set
Rotary tone and volume controls
Up/down tuning buttons
Headphone socket
Batteries 6 x LR20/D size (not included)
Line out socket

Dimensions

Size (mm) 295(w) x 165(h) x 115(d).
Weight 2 kg
Available in black

What is DAB Radio?

DAB stands for Digital Audio Broadcasting, this is a way of broadcasting radio digitally via a network of transmitters. It provides listeners with more choice, better sound quality and more information.

More Choice

Because of the way DAB technology works, broadcasters can transmit many more stations than ever before. Listeners in most major towns and cities in the UK can receive between 30 and 50 radio stations with a digital radio, in many cases that's more than double what's available on analogue. Because digital radio uses the spectrum more efficiently than analogue, it is possible to broadcast more channels using the same frequency, making room for broadcasters to expand their station portfolios.

Less Noise

DAB digital radio delivers improved sound quality. The technology allows the receiver to lock on to the strongest signal it can find and ignore everything else. This eliminates the hiss, crackle and fade so familiar on analogue radio.

Ease of Use

A DAB digital radio will tune to a station at the touch of a button. No more fine tuning a station to get the best reception. A DAB set allows the listener to scroll through a list of available stations by name - then tune in by pressing the 'select' button.

More Information

Have you ever heard a song on the radio and wanted to know who it is by or what it's called? Or tuned into speech radio and wanted to know what the programme is about or who is speaking? Digital Radios have a screen which can show text information transmitted by the radio station. Some stations send information about latest news, sports scores, what's on now and next, website address and phone numbers. Some radios offer an option to view the Electronic Programme Guide (EPG) which shows listings information for some stations. It is also possible to Pause rewind and record live radio.

Box Contains

ECO4
Instruction Manual
Mains Lead


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Customer Questions & Answers

Customer Reviews

Top Customer Reviews

I bought one of these radios for my wife a year ago (sorry Amazon, not from you on this rare occasion) as she wanted to listen to Planet Rock (probably the best radio station in the world) in the kitchen.

This is quite a good looking product, very well made and with a pleasing blue glow to the easy to read display. Setting up the radio was simplicity itself and we have had no problems at all with getting great reception, even with the aerial only slightly extended.

Sound quality is very good considering the size of the unit and I'm glad I opted for a stereo radio rather than mono....it's worth the extra money.

Roberts has a good reputation for DAB radios and I can fully understand why.

I would recommend this product to anyone wanting a very good quality, portable DAB radio.
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If anyone had any doubts about this radio, forget them, you won't be disappointed!

I own a Pure Elan that I bought some years back to use in the bathroom. At the time there weren't many battery-powered DAB radios available. The Elan has always worked well but I was disappointed in the dull flat sound it produces, no bass or depth to the sound. Replacing the batteries was always a challenge as you seem to need three hands to do it without the six (heavy) size 'D' batteries falling on your bare foot and breaking a toe!

So I thought it was about time to look for a replacement. I did my research and the Roberts Ecologic 4 came out top. Now I'm left thinking why I took so long to replace my Elan as this radio has blown me away! Everything about it smacks of quality; good solid build, easy and intuitive to setup and use (very little in the box other than the actual radio), great solid punchy sound with separate bass and treble controls, and what controls! I always test the build quality of an item by it's moving parts as so often it's what the manufacturers skimp on to save cost. I love all of the dials and buttons on this, especially the two big dials at each end for volume and tuning (there are preset buttons too.) It's so much better to have analogue dial control over the volume than the usual stepped up and down buttons. Ok, it might not actually be truely analogue, it could be very small digital steps, but if it is I can't really tell so I don't care if it is. The only things I cannot verify is (1) how well it picks up and holds a digital signal because I receive a strong signal where I live (SE London), and (2) how long the batteries last (I used to have to switch my Elan to FM when the batteries weakened, as FM needs less power than DAB).
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Verified Purchase
I bought this radio for my wife for a Christmas present and I was so impressed with it that I bought one for myself to use in my garden shed whilst pottering about.

When you first switch it on it searches for all the digital radio stations that can be found in your area. You can then assign these stations to one of 5 buttons, pressing another button lets you set another 5 presets making 10 in all - plenty for me. The sound is great - clear and sharp. Separate treble and bass buttons alow you to make the adjustments you need for your own personal ear. The 9.5 x 2cm display has various settings including a streamed display of the current programme. Tuning is by pressing the "up" and "down" buttons to go through the programmes stored on the radio or by a tuning knob.

The radio looks classy with a black finish and blue display (there are other colour versions).

I haven't yet used the radio on battery, but Roberts claim 150 hours battery life which seems a long time to me. Sorry that I can't confirm this yet.

Overall you can buy this with confidence that you will be getting a good looking radio that sounds great.
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Verified Purchase
Purchased this radio in August 2010. Up until now I would have rated the radio 5 stars +. Now ( as it appears with numerous other owners) the on/off switch has suddenly stopped functioning. I e-mailed Roberts customer service, but had no direct explanation to my question regarding the apparent design fault with the switch. To have Roberts repair the radio + my postage costs to return the item is around £40.00. Roberts offer a three month guarantee on their repair.
At the very least I think Roberts should offer a free repair service and agree to cover all postage costs for customers who have purchased the RD21 with a faulty switch. I thought the Roberts brand was synonymous with quality and excellence.Obviously this model has slipped through their quality control! I won't be paying Roberts to fix the switch, especially as they only offer three months warranty. All in all disgusted with Roberts and their customer service.
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This is a superb radio with a very detailed sound.
As a former music teacher I am very aware of tone and this little radio has good bass for the size. I use it for Jazz FM on DAB . The only thing to watch is to move the ariel and rotate the radio to get 0 error in the signal error display.
You can easily disconnect the mains and carry it to any room or the garden.Haven't had it long enough to check battery life but I would believe 150 hrs at four hours a day. Surprisingly loud for its size.
As good as it gets for the money. Why pay double for a Pure Evoke? I bought one for my sister.
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