K911 max gps drone 4k professional obstacle avoidance dual hd camera brushless motor foldable quadcopter rc distance 1500m 2022 new k911 max gps drone 8k professional dual hd camera fpv 1.2km aerial photography brushless motor foldable quadcopters item no.: k911max gps drone product specifications (cm): expand: 32*32*8cm / fold: 15.5*9*8cm main material: abs, hardware, electronics battery parameters: 7.4v 1800mah remote control charging method: usb cable charging charging method: usb cable charging usb charging time: about 90 minutes flight time: about 25 minutes remote control distance: about 1200 meters 5gwifi image transmission distance: about 600 meters 911max features: 360° omnidirectional laser obstacle avoidance flight environment: indoor/outdoor remote control frequency: 2.4ghz ptz: esc remote control 90 degrees up and