First, download the apk of Dangbei Market from the computer (click Download Now) and copy it to the USB flash drive. Then connect the U disk to the USB interface of Nut Smart Wall O 1 Pro, and the system will detect the external storage device. Second, or set-common functions in the Nut Smart Wall O 1 Pro, open the file management -—USB device, then select the installation package, find the apk in the Betan market, and click OK to install it; Thirdly, the Betan market of Nut Smart Wall O 1 Pro has been installed, and we can download the applications we need at will.