Blomiky JXD 510G 5.8G FPV HD 720P Camera Altitude Hold Drone RC Quadcopter 510G exta 1 battery 0.145kg=0.32lb net weight with battery.Include Extra 1pcs 800 mAh(real 650mAh) Battery(2 color silver or blue) ,Put in transmitter.Flying longer than original 600mAh Battery 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 Beautiful Cam, Air Pressure Sensor Altitude Lock, Easy Control Headless Mode, Return Home Key, 6 Axis Gyroscoper, 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 2.0MP FPV Real-time HD 720P camera: Capture and record every beautiful and unforgettable moment.detail can see video sample taken by the camera. youtube video You can ask send free spare part within 3 month if any problem. Correcting Flying level and Emergency Stop way see Image 2,3,5