A photo album kit specifically tailored to assist friends and loved ones in helping those suffering from short-term memory loss. The reverse current detector generates a proportional voltage that is proportional to a voltage at a junction node between the second switch and the inductor, and detects a generation or an indication of the reverse current based on the proportional voltage. A digital camera 100 has a wireless communication function of wirelessly connecting to a PC 101, which is an information processor. A lock mechanism can be provided to unlockably lock the elevated holder 4 to the body 2. When it is desired to perform wireless tests on a device under test, the robotic arm may move the device under test through the trapdoor into an interior portion of the test chamber. to complete the selective ohmic contact in the ohmic contact region.