walkera just keeping working on little bugs, and little fpvs, this is about their newest design qr w100s.
Walkera w100s review is not an easy job, it’s too much look like the w100, but it actually has greater propellers, which increased lifting power; also they equipped it with ratio gear for longer flight time. It can also be controlled both by iphone, ipad or walkera devention series radios, flight time will be depending on the battery you are using, with the original battery usually 3 to 7 minutes. might be longer with battery of bigger volume, but please consider the weight of the battery and the size.
it looks like walkera is working on more wifi control rc helicopters, this is joyful and convenient anyway.