If you're on the road, this top gear will get you from A to B without a detour through C

Avoid the charge
You're sailing through London, and suddenly remember you haven't paid the congestion charge. Plug this into your car's cigarette lighter and when you enter the charge zone it triggers an automatic payment to TFL.
KenBuster, £50 plus £8 a month for a year, or £200 with no monthly fee, www.kenbuster.co.uk

Drive time
It's drive time, and all you can find is jaunty pop and classical music. This radio opens you up to the hundreds of stations DAB has to offer. And if there's still nothing to your tastes, just plug in your MP3 player and hit your 90mph playlist.
Pure Highway in-car DAB Digital Radio with FM Transmitter £69, www.amp3.co.uk

Don't drink and drive
If your livelihood relies on you being able to drive, getting banned will have big repercussions. This will let you know if that quick couple after work tipped you over the legal limit, or if you're good to go. Just slide it open, blow into the tube and it'll give your level of intoxification. Alcosense Professional Breathalyser, £60, www.alcosense.co.uk

Name recognition
You can tell when a brand has made it: its name becomes synonymous with the product. Think satnav, think TomTom, and on this evidence it's deserved. It lets you alter maps based on local knowledge, has advanced lane guidance, and comes with maps of Europe, the US and Canada.
TomTom Go 930, £400, www.tomtom.com

Hear the way
This Bluetooth headphone, at 4.2mm, is the lightest and thinnest around and won't make you look like Madonna circa 1986. It's subtle enough to stay out of view when you're driving, and with two hooks and six speaker cover ear buds, it'll fit no matter what your ear size.
Bluetrek Metal, £29, www.bluetrek.com

Rear view
Some top of the range cars already come with cameras mounted on the back. Some map out your tyre tracks with graphics, showing you your turning circle. This shows you what's behind you, and will fit on any car, so no need to splash out on an Audi R8.
Wireless Colour Reversing Camera, £130, www.maplin.co.uk