Ultra-bright 3~5mW red laser light, different from those products with unclear small light spot; Equipped with an additional smart writing ball point pen, the refills can be easily changed; Pen body is of robust and durable design and treated with a bright coating finish, excellent quality, and is equivalent to a high class smart writing pen * It is a Red Laser Presenter Pen with function to remote control presentation slides up and down. * It adopts the infra-red remote control technology for easy operation just like operating a TV set or air-conditioned unit (directional). Designed for easy operation, and can do it yourself for changing the refill and battery. * Elegant design, supplied with a pen clip, convenient for carriage. Upon induction of the receiver, the red light is flashing as indication. Can be used without installing an extra software. * 100% made in Taiwan, quality assured. This unit meets the International Laser Safety Standards in the USA and many western countries.