NOTE: 1. For Spektrum transmitter user: You will need an DSMX satellite with 2 antennas come out (SKU: SPM9645) for binding with your radio. Make sure your radio Frame Rate is set as 11ms before you binding. If you use the DSMX with 1 antennas come out (SKU: SPM9745), it will not bind. We addressed this problem with our manufacture and app developer. They will update and fix it soon. 2. For Futaba transmitter user: Before you binding your radio to the helicopter, please go to setting and update receiver boards. Make sure your radio protocol set as S-FHSS. 3. For the JR sat (JR DMSS RA 01L), you have to rewire the cable to match with the sat output from the board. If you still can't bind with the T15, you can bind it from the separate receiver before you plug it in the T15. Focus Shots Standard equipment T15 Main Blades x 1 set 15M Main Motor(1500KV/2405) x 1 15MT Tail Motor(8000KV/1103) x 1 T15 Digital Servo x 2 T15T Digital Servo x 1 T15 Tail Blades x 1 set Remote Extension x 1 Li-Po Battery 2S 380mAh 50C x 1 T15 Specification Length: 272mm Height: 85mm Main Blade Length: 120mm Main Rotor Diameter: 280mm Tail Rotor Diameter: 51mm Weight(Without Battery): 100g Accessories T15 Kit x 1 T15 Main Blades x 1 set T15 Tail Blades x 1 set 15M Main Motor(1500KV/2405) x 1 15MT Tail Motor(8000KV/1103) x 1 T15 Digital Servo x 2 T15T Digital Servo x 1 Remote Extension x 1 Li-Po Battery 2S 380mAh 50C x 1 T15 Carry Box x 1 1.3mm Hexagon screw driver(Blue/8.2g) x 1 0.9mm Hexagon screw driver(Red/8g) x 1 Feathering Shaft Wrench x 1 Parts box x 1 DOWNLOAD T-15 iOS/Android app here- Self-provided Equipment ALIGN T6 or Futaba S-FHSS 2.4G Transmitter. For the use of JR and Spektrum system, require J