Power supply adapter for a variety of different devices such as CCTV cameras, routers, modems, consumer electronic devices, toys, etc. Works with any device using the 2.1mm/5.5mm plug that requires anywhere up to 0.5 amps (500mA) Works with most Discovery Kids Projection Alarm Clocks (Check voltage/amperage to ensure its the same) - Design does not work with the Discovery Rocketship Clock