Features 1、Made of premium materials to ensure its durability and long life. It has a sturdy construction, attention to detail, resistance to pressure and abrasion, and is able to withstand long hours of use. 2、The instructor pen is ergonomically designed to conform to the grip habits of the human hand, providing you with a comfortable grip experience. 3、Utilizing the latest crystal optics technology to create a premium pen pointer. It emits a strong, brilliant beam with a long range. 4、It can be used to point at any desired target on projection screens, video displays and graphic presentations. It can also be used for forensics, illumination, pointing, alignment, sky pointing (astronomy) or just to be cool. 5、Simple to operate, press the button to turn it on and release the button to turn it off automatically. Specification: Material: ABS, Metal Color: Red/Blue/Green Output power: 5mW Wavelength: 532nm - 405nm Range in darkness: More than 1000m Power supply: AAA battery (not included)x2 Output mode: Constant wave Size: 14 x 155 mm Package List Package Include: 1 x Pointer Pen Note: 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.