Well after a few weeks and now two RA units, I would avoid this product like the plague. Where do you mount the Speed camera detector? On the dash in direct sunlight? of course your do. What happens when you do? The RA overheats even though it's not powered up and dies, the charging circuitry is rubbish and the charging light flashes. You are unable to power up the RA even though it's hardwired as the battery requires some charge, catch 22 when the charging is suspended. The local RA sales manager tells me it was fixed in a new firmware release, but now on my second RA and just charging it in my lounge it has died again with the flashing red light. Even after I updated it from the web as instructed. Listen to RA's answer to this problem..... "My Professional wont work in my car and it is a hot or very sunny day, what can I do?" The Professional needs at least some charge in the battery for it to work properly. If the charging circuit has been suspended for some time, due to the excessive heat in the car, it is possible that all of the available charge in the battery has been used. To continue charging the unit remove the Professional from the car and charge it in a cooler location. It may take up to ten minutes from removing the unit for the internal temperature to fall enough to allow the battery to start charging properly again. Successful charging is indicated by a constant red LED on the front screen. Excessive heat? what a crock of sh!te, it's June and not exactly hot, my car even has a solar roof to keep it cool and teh unit still breaks.