A device to test image-capturing abilities of photosensitive components includes a movable assembly and a fixing assembly. The movable assembly includes a first wireless transmission module. The fixing assembly comprises a second wireless transmission module. The second wireless transmission module is wirelessly connected to the first wireless transmission module avoiding wire entanglement or winding as the movable assembly is rotated. The first wireless transmission module receives image signals from a camera module and wirelessly sends the image signals to the second wireless transmission module.