I got one of these - bit cheaper and just 27g. Works well. Toss in a T-Mobile SIM with $10 on it and you are good for months. You send it a text and it texts back a map with the location of your drone. Attach with some industrial strength velcro and you are good to go. As a bonus it's actually a real cell phone. You can pre-program your own phone number into one of the SOS buttons. Anybody who finds it can push the button and call you. And you can phone it too - it has a fairly loud ringer. Only major downfall is that it's from China so be prepared for a bit of a language barrier when you try and get it running.