Features: To solve the problem of difficulty in disassembling original battery, add a quick battery release to the flight tail, and the battery can be easily removed by pressing; With dynamic designed, the tail can help the fuselage cut the airflow and reduce air-resistance; Lightweight and almost does not affect flight; Snap installation, stable and not easy to fall; Small tail to enhance appearance, color marking can quickly locate the position in flight; Does not include the Aircraft; Specifications: Material:ABS Color:Black,Green;(Optional) Size:Approx.6.4x5.8x4cm/2.52x2.28x1.57in Note: Does not include the Aircraft, Transition: 1cm=10mm=0.39inch, Since the size and weight are manually measured, due to different measurement methods, there may be certain errors in the weight and size of the product, but the error does not affect the normal use of the product, please confirm that you know and accept the error before purchasing; Due to the difference between different monitors, the picture may not reflect the actual color of the item,please make sure you do not mind before ordering, Thank you Package includes: 1xEmpennage