Syma 3 Channel S105 Mini Indoor Co-Axial Metal Frame Helicopter (Red) Miniature size & light weight. Super wide infrared control miniature design for indoor flying 19cm long and weighing an incredible 34 grams Controlled by 32-level high precision speed. Auto stable, rotor blade system for steady lifting-up 3-Channel Helicopter movement forward / backward / up / down / left / right , High tenacity propeller , POWERED BY 2 SOLID MOTORS WITH A 3RD MOTOR IN THE TAIL ROTOR High capability, dynamical Li-Poly battery. Can be recharged through the transmitter provided , Charging and power indicator Controlled by digital technology. Infra red control system , Tri-band Technology. Nonintervention used 3 bands , High efficiency, driving motor and surge power