RC 3.5 Channel Flying Toy Helicopter. This RC helicopter has a miniature design for indoor flying only. Helicopter Unit: Aluminum alloy structure and LED light; high toughness rotor is hard to break; equipped with gyroscope for high sensitivity and stability; available in red & yellow color; built-in 3.7V 1000mAh li-Poly battery rechargeable through supplied USB Cable to be connected to any powered USB port; charging time 40 minutes; action time 8 minutes; Dimension(cm): 23 x 4.5 x 10.2. Transmitter unit: powered by 6 x 1.5v AA batteries (not included); range is 10 meters.