Welcome to LYZRC TOP store, we are professional remote control toy sellers! We are confident in our products. If you find any damage when you receive the goods, please contact JOOM platform customer service. Please do not leave negative comments. Each of your comments is important to us. Thank you! Description: Pressure sensor: Height setting Positioner:Optical flow positioning Motor:1503 brushless motor Electric regulation :4000/KV Image transmission receiving method:2.4 WIFI Lens:Self stabilized electronic anti shake lens Remote control battery:AA * 3 to be purchased separately Capacity of smart lithium battery:3.7V 1800mAh Control distance (Free interference and no occlusion):100M Flight time:About 20 mins Charging time :About 1 hours USB Charging: 5V Product size:Folding:12*8*7 CM Open:29*23*7 CM Take-off Weight:150g Camera parameters Pixel:4K HD Camera Camera lens Adjustable camera by transmitter90° Wifi image transmission distance :(Free interference and no occlusion) About 50m Focal length:50X Frame rate 25 fps Hand gesture shooting/video reconization:1-5M 4K:Video resolution(Front camera) 1280*720P Photo resolution(Front camera) 3840*2160 P Function description: 1. The front lens is placed with wide-angle 4K high-definition WIFI, the bottom high-definition lens with optical flow can switch the camera angle, the servo pan tilt is designed to increase stability, and the EIS electronic anti shake is added to make the photo line clearer 2. The height fixing function has the height keeping mode function, and the optical flow positioning and fixed-point function has stable flight. 3. Ultra long endurance 3.7V 1800mAh Li ion battery, which can last about 20 minutes, 4. Customize the route. You can draw the picture you want to fly on the APP 5. APP mobile phone control, Back with one key, headless mode, ascending and descending, forward and backward, left and right side flight 6. Hand gesture photography, optical flow positioning, brushless motor, ultra long endurance, obstacle avoidance head assembly, which can stop when encountering obstacles without colliding with them 7. Brushless motor provides more powerful power and longer service life 8. The size and weight of the product are light, and the body weight is 150g, which can circumvent the national aviation control (some countries require certification or registration for UAVs over 250g, and 210g can eliminate the challenge of certification and registration) 9. 2.4GHz anti-interference technology, six axis gyroscope, more stable flight, more convenient control. 10. If the distance is exceeded, the UAV will not be lost. It only needs to be connected to the front signal to control the UAV again 11. Low battery alarm, the remote control will give an alarm sound when the battery is low Package Included: 1 x A9 RC Quadcopter 1 x Remote Controller 1 x 3.7V 1800mAh Lipo Battery 2 x Spare Propellers 1 x USB Charging Cable 1 x Screwdriver 2 x User Manu