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Syma X21 Mini Quadcopter w Altitude Hold

http://www.xheli.com/56h-x21-mini-black.html http://www.xheli.com/56h-x21-mini-white.html Syma X21 Mini Drone is the newest drone upgraded with multi features, super stable and suitable for kids and novice users. Another special feature of the X21 is the push button take...