Easy to Install - Every part needed for setting up the cabinet lighting system is included in the package. (Adapter,Dimmer,Distributor,Puck lights,Extension cables). There are two methods of mounting the puck lights underneath a cabinet: screws or double-sided tapes. Brightness Adjustable - The brightness is adjustable from 0% to 100%. High brightness is great for accent lighting, while low brightness is for atmosphere lighting. Plus, the dimming setting can be remembered, so that when the lights turned on next time, the brightness will be the same. Super Bright - The super bright LED puck lights can fulfill the requirements of most daily kitchen cabinet lighting and common display cases lighting. You can also adjust the mounting distance of each puck light to gain uniform lighting as you need. Slim Aluminum Puck Light - The thickness of the slim light puck is only 0.3 inch. As a result, the puck lights are almost invisible when mounting underneath a cabinet or counter until the lights turned on. Plug in Puck Lights - Comparing to the battery puck lights, the 120V electric wired puck lights are not only much brighter, but also maintenance free. You do not need to change the batteries (or recharge) frequently. It is DC12V operating, so it is very safe for touching.