Long Battery Life

• Runs for a minimum of 4 continuous hours on 2 standard alkaline batteries (included)

Sturdy construction and a long battery life allow for heavy use as a teaching tool for science presentations, conferences, lectures, seminars, and planetariums. Designed with an attractive, brushed-metal finish, this incredibly thin pen-shaped unit can be easily carried in a shirt pocket. It projects a brilliant red dot clearly visible even in bright ambient light or with video, film, and slide presentations.