Got this device. Only paid 19.99 on amazon. Made in Japan. Find a sim card that lets you just top off. I ordered a ptel pay as you go and worked fine. So there is no monthly service. You call the device by calling the sim card phone number and it will text you it’s location. You can get a text notifying you of battery usage. It comes with two rechargeable batteries. Amazing what you get for the price. It may not be the best GPS but it works fine. It’s small. Has a magnet attaches on all kinds of surfaces or just put it in your razor any where. We needed two of them. So I didn’t want to be paying for two montly services. This is inexpensive, no monthly plans and works great. Everything works by texting or calling it. One note, the move function does not work that great with regular gps. I think it would work better with GPRS. When you have the GPRS turned on the battery goes down much faster. So I leave it on GPS only. However you can turn the GPRS on with a text message at any time. there are many you tube’s on it if you wish to see it in action. The price really varies so look for the cheaper price. One guy charges 86.00 dollars for it and offers what he says is a better instructions. The instructions are fine. the only problem I had was the sim card. I was clueless and finally figured that part out. When you get your sim card don’t take the smallest part of the card out. Take the larger part. That’s what you put in the GPS. Knowing that would have saved me a day or two of not getting it to work. Also it took getting sim cards that didn’t work in it at first. So waisted some money on that. Just get the ptel pay as you go online. 15.00 dollars and you can top off online when you need to. There are a few others that work but I know this one does.