It comes ready to fly. An incorporated auto stability system making it easy to fly. Description: 3CH indoor flying helicopter Scale: 1: 64 Size: 16X13X8CM Boxsize: 20x14.5x15.5 Packing: 18PCS/CTN, MEAS: 68*32*50CM. G. W 9.0KGS, N. W7.0KGS CBM/CTN: 0.006 Mail Packing: Shenzhen A pre-installed 3 channel proportional wide beam infra red Control system that is also tri-band A, B, C. Recharging takes place via the included transmitter. The transmitter has an Alignment Trim, a Charging and Power Indicator, a Left/Right Lever and a Trimmer. A lightweight Lithium Polymer flight battery. Full instructions. Suitable for indoor flying only. A charge of 20 minutes is equal to a 6-7 minute flight. Suitable for ages 8 years+. Battery for the helicopter: 3.6V, 65MAH LI-POLY (included ) Requires 6 x AA Batteries for the transmitter (not included). Flying distance: 10 meters CE, ROHS APPROVAL