... It comes with one DC transformer;2. Automatically switch for only display the time (this is optional) ... DC 6V/500MA power supply, external power, built-in button batteries, when power normal travel time.Specifications:The ... up at night, you don’t need to switch any other night lamp, the brightness can be ... alarm function.4, 12 / 24 hour free to switch. In the normal display state, press the button (DOWN) ...