Specifications: Mini size, light weight and portable. This clip-on light has two CR2032 batteries as power supply, a high-bright LED as light source, Long service life, bright light beam, fashion design. Can clip to the glasses legs. It can rotate 360 degree. It is a great helper for your daily life. Great to be use in car, in bed, on a airplane, camping or where light are too dark to reading. Item Name: Reading Light Light Bead Type: LED Material: ABS Power Supply: 2 x CR2032 Batteries (Included) Features: Lightweight, Portable, Mini Size, Clip On, Rotary Size: 36mm/1.42 (Approx.) Notes: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Package Included: 1 x Reading Light