The lighting source is softy and is for sleeping and driving, it won't produce flicker, shadow, dizzying or negative radiation, with softy light colors. The most suitable light both pages of a car interior, notebook or anything else, so it makes less strain your eyes, and creative a unique atmosphere when you are in boring driving. Features -Color: Assorted. -Material: ABS. -Size: About 2.50X1.50X0.50cm/0.98X0.59X0.20inch. -Light Source Power: 34MW. -Voltage: 5V. - 20MA. -The practical mini night lamp is made of gentle ABS material, which is durable and practical for long time use. -The lightweight and compact design make the mini night lamp easy to carry even travel. -Can be used at night, when you are in boring driving, create a warm and romantic atmosphere. -Lightweight and portable, easy to carry and store, softy light, flicker design but not dazzling. -Especially for laptop, computer keyboard light, outdoor camping lighting, car interior light, etc. Package list: 4 mini USB lights