A power adapter is required but NOT INCLUDED. Safe to use. The working voltage is 12V, extremely low heat. Please do not use power adapter that is higher than 12V to supply. The wattage is 18W, Please be kindly informed that the total wattage of LED strip lights should not exceed the max wattage of power adaptor. It is touchable and safe to children.Easy Installation. Self-adhesive back with adhesive tape for safe and easy application.Cuttable and linkable. Easy to cut and link. The length of the whole strip light is 16.4FT, which is a series of lights, but it can be cut into every 3 LEDs along the cutting marks without damaging the rest strip, which does not mean that there are many strip lights..Flexible operations. Slim, compact and flexible PCB strip. Mount end-to-end for bendable or angled patterns, or in continuous rows. Note: The strip light is very fragile. When installing and using, special attention should be paid not to involve and tear.