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(Click the pictures for reviews & links) 


Yi 2 - Best Budget 4K 

Gitup Git2 (My Pick)

Xiaomi Yi

Dazzne P2

Yi Ultra 2.7K
Mobius (also works as a Dashcam)
Polaroid Cube+
Sena Prism Tube

My favourite USB battery power Pack

This is the excellent USB power pack I use when I travel.

2 x 2.1amp outputs. 8400mAh capacity.

Two digit Led display shows battery level


What SD CARD should I buy?

If you want an SD Card for your camera - these are the ones I use and recommend. 

I'd strongly recommend not to buy any SD cards off ebay - I've heard about too many issues with counterfeit cards - often sold on by unwitting resellers. My inbox regularly gets messages from people who bought a £150 camera then cheaped out and bought a £3 memory card on ebay - Then when it doesn't worth they blame the camera! It doesn't make any sense. Good memory is cheaper than it's ever been - see the links above.

A lot of HD cameras will not work properly with cards larger than 32GB (cards over 32GB are usually SDXC rather than the SDHC standard used by 32GB cards. SDXC cards use the ex-FAT system rather than FAT32 - in short they are a different standard). - so don't just buy the biggest card you can afford - read the specs in the manual to see what it accepts.


RECOMMENDED CARDS (for action cams - see dashcams below)

CLASS 10 UHS-1 CARDS (For HD Cameras)


U3 CARD (For 4K cameras)




The SD card in a dashcam is re-written over, more frequently than in other types of cameras. Some manufacturers void their guarantee if an SD card was used in a dashcam. So, no surprise, there are special High Endurance SD cards made just for's some.


VERY IMPORTANT. These links take you to the product, however Amazon have three different ways of selling. There's Amazon Direct - This means that you are only dealing with Amazon themselves, then there's other sellers that use Amazon's facilities - these show as Fulfilled By Amazon and finally there's Market Place sellers that advertise on Amazon, but operate independently.  I strongly recommend that you only use the first...the Amazon Direct - Sold By Amazon option. Even if it appears that you are paying a couple of £/$ more it is more than likely you are comparing the price of a real item against the price of a fake.

To give you an idea of the extent of the fake goods problem. In a 2016 survey by Apple - 90% of the 'Apple' chargers sold through Amazon - using the other the two methods..which includes the "Fulfilled by Amazon" option -  were found to be counterfeit....90%! 


« The Polaroid Cube Review | Main | The Useless Machine from Spikenzielabs »

The Seiko 'Sea Urchin' is a Smart Watch not a Smartwatch

I bought a new watch and I think it may be one of the smartest buys I've made in a long time. If you want to know more, watch the video below.

Purchasing links

Amazon UK  US

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Reader Comments (21)

Great review as always,with the tongue in cheek humour! I had a Seiko 0674 digital watch as worn by Roger Moore in The Spy Who Loved Me,but without the Dymo coming out of the top! As it was such a miserable night out there, I decided to look at some of your back catalogue. Most enjoyable, especially gems like the DOTKLOK. My, my, your presentational skills have come on leaps and bounds! Anyway, am looking forward to your review of the Polaroid Cube. Also, I see that Innovv have a new model, the C3.( I thought that was a Citroen...) It looks ideal as a dash cam, what with the very small and discrete camera(snake cam). Maybe a review in the offing?

October 4, 2014 | Unregistered CommenterTerry Carter

The C3 that was on it's way to me from China appears to have gone AWOL, however expect the Cube review in the next few days.

October 4, 2014 | Registered CommenterTechmoan

Looking forward to the Cube review, hope it revives Polaroid's fortunes. Disappointed to see their brand name on some rubbish TV's in Tesco though. Edwin Land must be turning in his grave. BTW, I really think you should send your CV to The Gadget Show, their presenters behave like they're talking to kids. But maybe you prefer your reviews to be a hobby. Beats fishing eh?

October 4, 2014 | Unregistered CommenterTerry Carter

I know that tv would never have me, and a few years ago that kind of thing would irritate, now I'm older I realise that I would find it very difficult to adapt my way of working to a structured tv environment, so I'm happy carrying on like this where I have full control.

October 4, 2014 | Registered CommenterTechmoan

Lovely review about something I really don't know anything about. Not worn a watch in 30 years, but you make me want to get one!

October 5, 2014 | Unregistered CommenterVoyager03

We have two daughters. I'd hoped for a least one boy so I could justify buying a Rolex and then pass it down as a family heirloom. No such luck.

I've narrowed my collection down to two watches. My outdoor fun watch is the Casio G-shock Gw-9400:

My dress/office watch is the Citizen Men's AT4008-51E:

Both watches have atomic timekeeping and are solar powered.

October 7, 2014 | Unregistered CommenterChris

I used to own a Rolex Submariner and I loved it but had to sell it due to change in circumstances :( This looks like a good alternative, stylish, reliable and with a solid reputation. I really think you need to spend £100+ on a watch to get something you can wear for years and years to come.

October 7, 2014 | Unregistered CommenterJames R Clark

i don't wear a watch Mat, but I found your review interesting and informative, as always. My father left me an Omega Constellation when he passed away, which is an elegant a watch as you would ever wear, now more than 60 years old, but looks like brand new, but it has an automatic system and day/date display. anyway, keep up the excellent work you do.

October 8, 2014 | Unregistered CommenterQuaser

Which pin removal tool do you have there, and where did you get it? I've found a few alternatives on Amazon, but the reviews of them tend to be of the "this is cheap for a reason" type.

October 31, 2014 | Unregistered CommenterAlex

It was from a chap in China on eBay. It seems to have been as one off. I wouldn't call it professional or top quality, but it works. I don't think you can go too far wrong with any cheap watch link removal tool, unless you plan to use it professionally to do hundreds of watches.

October 31, 2014 | Registered CommenterTechmoan

Not hundreds, just the Seiko 5 to which I treated myself after watching this video. Turns out I have a small wrist, too. Or Seiko usually sells to giants...

October 31, 2014 | Unregistered CommenterAlex

I've dropped by to your blog searching for a reviews of dashcams and... :-)
about an article on wired - I'm as well as all guys from the forum are responsible for the watch modding mania of that "5" on front photo.
The one below is the "original" hommage of Blancpain Fifty Fathoms that was designed by "us".

Thanks for reviews!

November 3, 2014 | Unregistered Commenterfikthor

As a comedian once said, it's a small world....but I wouldn't want to paint it.

If it wasn't for the Seiko 5 modding community, I might never have become aware of the 5 in the first place.

November 4, 2014 | Registered CommenterTechmoan

I really like the look of this timepiece, and although I normally have dearer stuff, there is no way I'll every be having a Rolex and this looks brilliant and as you say in the video it being respected for what it is amongst the people that know is part of its charm. Anyway, my query is, does anyone know what high street shops or larger jewelers in the UK might have one for sale so I could see before I buy? I can't seem to find it visibly for sale and in stock anywhere. Keep up your excellent work. I'm all Mobiussed up because of your website too...

November 8, 2014 | Unregistered CommenterPee Diddle

Thanks Matt for a great review on the Sea-Urchin.
I was so impressed - I ordered one straight away! Good tip about the link removal tool, bought a metal one for £3 off ebay. Watch arrived today and I removed two links easy. No batteries to replace now either. Smart Watch!

January 3, 2015 | Unregistered Commenterpluto

Great review as always and I too have bought one off Amazon (mine came from the USA) all because of your recommendation... I have had it a couple of weeks now and agree its a beautiful time piece... The best watch I've owned.
Rob (UK)

January 9, 2015 | Unregistered CommenterRobB


Just read your review and thought 'that 5 looks familiar, it reminds me of the watch my father bought for my coming of age 13 as a teenager' (47 years ago !). Loved that watch but stopped wearing it when I left school at 18, became a johnny come lately hippy and went travelling (fyi hippies did not wear watches in those days). Had a hunt around the house to no avail but as usual swmbo knew where it was and to my pleasant surprise my father got it right and it is a '5'. Not a diver's version as yours (love it, want one) but more conventional with a blue face which was the envy of my classmates.

So thanks for the video, you have made my morning :)

ps It also prompted me to dig out my father's watch (which he also loved) that my mother gave to me a year or two ago. Turns out that is also an iconic watch - an Omega Seamaster as in 007. So, went to bed last night watchless and awoke fully watched up !

January 13, 2015 | Unregistered CommenterPaul Anson

Nice story, always happy when I can help, even if it's just helping to jog a memory.

January 13, 2015 | Registered CommenterTechmoan

I'm a watch geek. Except for the snobs most of us appreciate a 5, it has a great heritage as simple but full-featured, honest-to-god, down-to-earth, unpretentious watch. Not a "timepiece", not a "creation", no nonsense, just a watch - and a bloody good one as well, rugged, robust, fairly accurate. There's a wealth of models, and a lot of those cite famous other watches, but they never pretend to be them. Yours copies the dial (not "display", come on :) ) of Rolex highly readable graphics without the nonsensical price tag and snobbery of a real one. It's not the one I want though, I'd prefer a SNZH which is based on an iconic Blancpain Fifty Fathoms (and usually wittily dubbed The Fifty-Five Fathoms) - you might like that one too.
If I may snob out a bit though, the thing with both watches is that they're pseudo-diver watches. They look the part, but they lack a couple of things that make them real divers - 200m water resistance, unidirectional bezel with a luminous dot at 12 and so on. Not that anyone really needs that any more, but for some reason I want it. If you ever feel the need to own a true diver, you might look into an SKX007 (no, nothing to do with Bond), which is also iconic and one of the most famous Seiko diver watches.

January 31, 2015 | Unregistered Commenterhorrovac

You just made me buy a Seiko 5 - and I love it!
Thanks for this lovely intro into the world of watch geeks - you rock!

July 8, 2015 | Unregistered CommenterGonçalo Dumas

The Seiko 5 seems to be one of a few true bargains left in the world. It's a product from another time, still made to the high same standards it always has been and sold at a sensible price.

July 8, 2015 | Registered CommenterTechmoan

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