EFL2000 Blade CX3 MD520 RTF Helicopter Based on the full size McDonnell Douglas MD520N helicopter E-flite’s Blade CX3 MD520N Police interceptor helicopter comes as a bind and fly with everything apart from 2.4 ghz controller in a simple one-box-purchase. This fantastic semi-scale helicopter features the very latest in radio technology with everything pre-installed. E-flite’s unique 3-in-1 control unit features a combination of main rotor mixing, main motor electronic speed control and a heading-lock gyro, all coupled to a Spektrum AR6100e receiver and all enclosed in a beautiful lightweight pre-painted polycarbonate scale body shell with the unique rotor- less tail. Control is provided by the included E-flite fully proportional 5-channel radio featuring Spektrum’s 2.4 GHz DSM2 technology for a really positive “locked-in feel” whilst power is provided by an E-flite 7.4volt 800Mah 2 cell Li-Po battery pack. Complete with a 12 volt DC balancing Li-Po charger for on field charging and a mains adaptor so that you have the convenience of charging the battery at home, four AA batteries The transmitter is ot included will fly on any 2.4 ghz spektrum handset so you can be flying this great helicopter in the time it takes to charge the flight battery pack. With absolutely no assembly required , what more could you want from a model helicopter, the Blade CX3 MD520N has it all! Handsets that can be used dx6i , dx7, mcx, or any 2.4 ghz eflite controller.