Over the summer I purchased 5 helicopters at one time for my three children and myself, first mistake not testing their quality first. Three of them died within minutes of the first flight.
The fourth one died one day later, it smelled like the motors completely fried or something. To date I still have one which is marginally operational. My kid never flies the thing because its so unstable. One of the worst purchases I have ever made.
When I tried to contact customer service, no answer; ever.
When I emailed them about the problem, again no response. My advice is DON"T SHOP HOBBY TRON