Description Brand：GOOSKY Model：GOOSKY S1 Width：54mm GOOSKY S1 Tail rotor diameter：53mm GOOSKY S1 Flight time：About 8min GOOSKY S1 Body height：88mm GOOSKY S1 Main rotor diameter：290mm GOOSKY S1 Take-off weight：About 107g GOOSKY S1 Charging Time：About 30min Features: 1.  GOOSKY S1 Pre-assembled w/motors, servos, gyro stabilization, and dedicated Mode 1 transmitter 2.  GOOSKY S1 Tough, durable composite frame w/alloy boom 3. GOOSKY S1 with Metal blade grips and swashplate 4.  GOOSKY S1 with Unique “cage body” metal geared servo system 5. Quick change battery system without having to remove the canopy 6. Easy set up using the GOOSKY S1 mobile phone APP 7.  GOOSKY S1 RTF Version Supplied with 2 flight batteries and charger（RTF） Includes: BNF: Goosky S1 Helicopter x 1 Goosky 300mha 7.4v Lipo Battery x 1 Bluetooth Device x 1 Box for Transport x 1 **BNF version comes with the Futaba protocol, which can be directly linked to the frequency, no additional receiver is required.