Blomiky JXD 509W FPV X-predators WIFI 0.3MP Camera RC QuadcopterAltitude Hold RC Drone Extra 1 Battery 509W 0.145kg=0.32lb net weight with battery.Include Extra 1pcs 800mAh(real 650mAh) Battery(each $9.99),Flying time longer. HD Wifi camera captures clear images from the sky. Enables real-time monitoring and remote control on your phone. The RC Drone contine flying even your turn off the Transmitter,So please Make the Drone not work before you turn off the Transmitter.this can protect drone not fly without control High hold mode: With high density air pressure sensor which can precisely hold the height. when you hold the height, you can release the Left trigger ,it will fly one height.Detail see our youtube video:https://youtu.be/BY4Pe8-DMts and video :https://youtu.be/oxYQJwjdT9Q Beautiful Cam, Air Pressure Sensor Altitude Lock, Easy Control Headless Mode, Return Home Key, 6 Axis Gyroscoper, One-Key return function, automatically return to and land at the take-off location at the touch of one button You can ask send free spare part within 2 month if any problem. Correcting Flying level and Emergency Stop way see Image 2,5,6