Brand: VSON - Model: V-809 - Built-in red laser pointer - Instant controlling of Microsoft PowerPoint & Media Player - 0.7" LCD with time displaying - Integrates the slide up/down functions with a laser pointer on a remote hand held device using a wireless technology - Attractive and compact design enables mobility of up to 20 meters - Laser wavelength: 650nm - Working on any computer with USB port - Receiver worked as a USB flash drive - Support Windows 98/2000/ME/XP/Vista/Mac os/linux - Frequency: 433MHz - Powered by 2*AAA batteries (included) - Package includes: 1*wireless remote 1*USB receiver dongle 2*AAA batteries 1*USB cable 1*pouch 1*English user manual