【Altitude Hold Function】Compared with other helicopters,SYMA S107H-R with this function is not available in most of them.It can be locked at a certain height when you release the throttle stick, which makes it easier to control the helicopter for beginner and kids. 【One Key Take Off/Landing】with these functions,The helicopter will hover at certain altitude automatically after taking off/landing.it is easy to operate for kids and beginners. 【Whole Alloy body&Anti-Collision】Whole alloy material weight 0.97LB is very sturdy with longer lifespan, which is suit for kids and beginners to play. No serious damage or dysfunctional appearance after many times crashes. *TESTED NO ISSUES*