The powerful T-Model light provides very bright light through 8 powerful LEDs rated for 100,000 hours. With 2 brightness settings and the adjustable gooseneck the T-Model provides comfort and versatility to accommodate all sorts of lighting needs. The extra-wide clip (up to 0.984") attaches to music desks, table tops etc. It can also be used as a standing light. The T-Model is powered by 3 (1.5 V AAA) batteries (included) with a typical battery life of 10 hours or an AC adapter (not included). The light comes with a durable carrying case as well. Vendor CONOK is requesting product description updated/revised: The powerful T-Model light provides very bright light through 8 powerful LEDs rated for 100,000 hours. With 2 brightness settings and the adjustable gooseneck the T-Model provides comfort and versatility to accommodate all sorts of lighting needs. The extra-wide clip (up to 0.984") attaches to music desks, table tops etc. It can also be used as a standing light. The T-Model is powered by 3 (1.5 V AAA) batteries (included) with a typical battery life of 10 hours or an AC adapter (not included). The light comes with a durable carrying case as well.