Abstract: A wireless network device and an automatic configuration method are provided. When no second wireless network device providing a wireless local area network (WLAN) is found or when a service identifier of the second wireless network device lacks a preset prefix, a first wireless network device operates in an access point (AP) mode with service identifier comprising the preset prefix to receive a first setting signal carrying a terminal service identifier of a network terminal device, switches its operation mode from the AP mode to a client mode to edit its service identifier setting by the terminal service identifier, and connects to the network terminal device. When the service identifier of the second wireless network device comprises the preset prefix, the first wireless network device connects to the second wireless network device to link the network terminal device.

Abstract: A method of displaying surveillance video is used for displaying a video relative to a scene on a displaying area of a displaying screen of a portable electronic apparatus. The method includes displaying the video on the displaying area in a frame size which is larger than the displaying area, setting at least one region of interest relative to the scene in response to at least one corresponding setting operation by a user; and in response to a selection operation on the at least one region of interest by the user, retrieving at least one sub-video from the video corresponding to the selected at least one region of interest and enlarging the at least one sub-video on the displaying area. Thereby, the user can effectively monitor the scene through the size-limited displaying area.

Abstract: A wireless network device and an automatic configuration method are provided. When no second wireless network device providing a wireless local area network (WLAN) is found or when a service identifier of the second wireless network device lacks a preset prefix, a first wireless network device operates in an access point (AP) mode with service identifier comprising the preset prefix to receive a first setting signal carrying a terminal service identifier of a network terminal device, switches its operation mode from the AP mode to a client mode to edit its service identifier setting by the terminal service identifier, and connects to the network terminal device. When the service identifier of the second wireless network device comprises the preset prefix, the first wireless network device connects to the second wireless network device to link the network terminal device.