The 4-Site Bind and Fly comes completely assembled with a Spektrum AR6400L Ultra-Micro DSM2 receiver/ESC/Servo unit that features two built-in linear long-throw servos for the elevator and rudder, and these along with the two independent long-throw Spektrum AS2000L Ultra-Micro servos on the ailerons provides great 3D performance. The Micro 4-Site is finished with a pre-printed high visibility colour scheme with no additional building or assembly is required, simply bind to your DSM2 aircraft transmitter and fly. The model has fully proportional 4-channel control of throttle, rudder, elevator and ailerons, with a state of the art 6-channel Spektrum receiver, ESC, and two individual aileron servos for maximum control. This combination of low weight, technology and design will now bring extreme 3D flight conveniently into smaller venues than previously possible, and experienced pilots will be capable of flying the Micro 4-Site in a large living room or small sports halls. This is one model that can certainly turn heads at any indoor venue with its outrageous flight performance! Wingspan: 385mm (15.2 in) Wing Area: 25.5 sq dm (87.5 sq in) Length: 445mm (17.5 in) Weight without Battery: 31.0 g (1.10 oz) Weight with Li-Po Battery: 35.5 g (1.25 oz) Motor: 8.5mm coreless brushed (installed) Receiver: Spektrum AR6400L Ultra-MicroReceiver/ESC/Servo unit (pre-installed) Servos: Elevator and Rudder servos integrated on the AR6400L with two independent Spektrum AS2000L Ultra-Micro long-throw aileron servos (pre-installed) This version does not included handset or batteries but are available at trct