... 3. intelligent control system 4.operation safe 3 channel wireless rc helicopter FLY R832 1. Function: up&down, go forward&backward ... battery for main body3. Charging time: 40 mins for helicopter,60 mins for transmitter by USB 4. Flying time: ... above 7 mins for helicopter,120 mins for transmitter5. Control area: about 12M 6. ... 36*72(CM)QTY/CTN: 24PCS 3 channel wireless rc helicopter