Walkera HM CB 180D 4 Channel 2.4Ghz RC Helicopter Brushless Version Precise CNC-machined metal rotor head provides more operation accuracy. Compact swashplate structure is adopted and with light and fine fuselage, it is super stable to fly New 2.4G technology, with the functions of identification and precise code pairing, can allow above 20 aircrafts to fly in the same field and same time High performance 370SH motor powered by 7.4V 1000mAh Lipo offers 10- to 12-minute flight time, depending on your flight mode.