Effective but provide an extension cord.

I will not go on the benefits of light (others have already done very well) and speak more of the product itself.
The lamp is therefore in the form of a tablet, small enough to be easily transported.
It comes with a carrying case made of gray felt that protects the scratches but not case sensitive.
The removable foot rests green (a compartment could be provided for storage in the holster).
So far so good. The snag is the power cord: it is barely 115cm and decision is enormous (8cm / 4 / 2.5) and of course no battery. The tip side lamp is jack type.
Personally I wanted to use it on the dining room table for my breakfast (we recommend 30 minutes of daily therapy 20cm face for at least 7 consecutive days and the duration increases to 2 hours when traveling to the 60cm face). But here, it'll require an extension cord. Ditto for the office .... so at least we could plug it into a USB socket ... not even.
The manual is a must read for against indications (children under 3 years, bp cornea, glaucoma, diabetes, use of certain drugs, alcohol etc etc)
Nice product but still with its limitations.