Black Knight BL901 Electric RC Helicopter GYRO 3.5CH RTF (Colors May Vary) by Velocity Toys. $54.95. Length: 19 Inches Height: 7.4 Inches. Features:  Electric Powered 3.5 Channel Gyroscope Equipped. Pro Series LED Lights Ready to Fly Easy to Fly. Remote Control Requires 6 AA Batteries (Not Included). Metal Alloy Frame Co-axial Rotor Maximum Stability Control Medium Size. Package Includes:  Medium Size Pro RC Helicopter Remote Control Wall Charger 3.7V 1100 mAh L...