1 high brightness LED as light source-, long service life-, light novel with 2xCR2032 button batteries as power-supply. Advantages: small size, light weight, good mobility, no matter change the wearers LED light ray- and the direction of line of sight- is the same. Adjust the arbitrarily, and can rotate 360 degrees. The LED glasses clip lamp- can clip the leg and middle of the glasses of any types., Manufacturer: JTQYFI