The Free-Fly Model Airplane once assembled and fully charged does not require strings to fly.  The assembeled model has a wing span of 23"s, a height of 8"s and an overall length of 17"s.  This Fre-Fly Model Airplane includes the following: 1) Spare propeller; 2) Portable battery charger; 3) Phillips screwdriver; 4) Yellow, white and green colors and 5) illustrated assembly instructions.  Note: this model requires 2 AA batteries - not included.  Never opened and factory sealed.