After hearing about quads flying off, I thought I would look into a tracking device of which found a good one I think this little uhf rf beacon sells for £14.31P including p@p this unit can be used with a walkie talkie 44.00625 to 446.09375 the address is www.distance-rc.com at the moment I have not done a test as yet, you can have the delay set to 15mins or 30mins before it switches it self on helps to save the battery 3.7volt lipo one cell, if flying in long grass or long corn I though this is a good investment.