I've bought your products and found them to be excellent. I wish I could say the same for your customer service department! I've sent them three E-Mails, and they've not even replied to them! I need to purchase another 501-S X4 as I've smashed mine up. If your people can't be bothered to talk to me, I'll talk to your rivals in the business, about purchasing one of their Drones. I'm sure that they will want to do business with me! You disappoint me Hubsan, your products are great! but your Service Department stinks! maybe you should kick some *** in that outfit.