This is a small Bluetooth GPS receiver I bought from Mobile Entertainment Limited and I bought this to connect to my O2 XDA 2i PDA for about £ 40.I am looking for cheap GPS receiver on Google, which is the cheapest.I think they will be a hot topic at this price, usually not performing well, but I was pleasantly surprised!This thing does work and works well!After searching for the original reviews on this device, I rarely come up with other reviews other than those from mobile Entertainment Limited, and I am reluctant to believe them because of fear that they are a bit biased.I thought 40 I would take the chance so bought it all thanks to the mobile entertainment that the receiver arrived the next morning.I was a little disappointed when opening the box, where all instructions were a small piece of paper, loosely translated from Japanese to English by a toddler with dyslexia.You can download the user manual from here and the Tomtom pairing manual from here.You will set it up immediately after following these instructions.Another thing I noticed is that there is no manufacturer's name or Mark anywhere on the device or package, which makes it very difficult to find support.One advantage of this small device is that it is equipped with a battery, which is a common battery (3) for many Nokia phones ).7V 850mAh Li-BL-polymer battery5C), a quick search on ebay means you can get a replacement battery for these receivers for about £ 4, which is fine if you need.What's in the box?If you follow the limited instructions for pairing with the device and the Tomtom installation instructions, you should start and run in less than 5 minutes.Since I bought the receiver about two months ago, I only charged it once and the battery seems to last forever!What is provided in the on-board charger and USB cable means that the receiver can move and charge from a 12 v power supply or from any PC or laptop.Starting with a cold start, the receiver quickly gets the usual GPS signal, faster than most of the very expensive GPS receivers I 've touched.The device is very small, and if you use it to walk or ride a bike, it can be easily installed into any space in your car or even in your pocket.A small problem I do have is that when I use it with XDA 2i, the Tomtom software freezes a lot, causing me to park, restart my phone, and then proceed with myAt first I thought it was the result of XDA losing its connection to the Bluetooth receiver, thus confirming my concern about the price of this product.Obviously this is not the case, in fact there is a problem with my PDA and Tomtom software.I quickly found a solution to this problem between Tomtom software and my XDA, which enabled the whole system to work perfectly.I will write a "how" on this workaround, as I believe many other XDA 2i users have the same problem.I know that due to the Bluetooth stack settings that come with the phone, there is a known issue when using any Bluetooth GPS receiver with O2 XDA 2 (note not XDA 2i, please pay attention to this before purchasing this device, as you will definitely have problems.Compatible with TomTom, Navicore and all major GPS packages.12 parallel satellitesTracking channels for quick acquisition and re-acquisition.Deliver superior navigation performance in urban environments.Built-In rechargeable lithium-The polymer battery provides continuous use for more than 10 hours.During use, the device can be charged with the included car charger.Mini-The USB charger is compatible, charging not only the Bluetooth GPS receiver, but also the compatible pda and smartphone with the same charger.The LED in 3 colors shows the Bluetooth/GPS/power active status of the device.Positioning Accuracy: Standard Positioning Service (SPS), WAAS (optional)NMEA Output Protocol: V.3.Baud rate: 38400 bps (8-N-Datum: WGS-Bluetooth: Bluetooth version 1.Output terminals: Mini Type BBattery: 3.7V 850mAh Li-Built-in polymer batterySize: 64 (L) x 39 (W) x18.Working temperature :-Storage Temperature :-20°C ~ +60°C;Battery: -A great little device with far more performance than its price range.Check your device and Bluetooth GPS receiver for any known issues before purchasing as this will save you a lot of trouble.The only disappointment with this product is the lack of documentation and online support, and beyond that, this product is well worth buying!