Features: 1) Smart fashion design 2) RF technology 3) Built-in flash memory is avaliable 4) Tailored as a convenient handy-tool for presentations, teachings, meetings, speeches, trainings 5) Consists of a remote control and a laser pointer 6) Functions: a) Laser pointer function b) Page up/down function d) Built-in flash memory (to be used with our V-150 receiver) 7) System: Windows98/2000/ME/XP Linux & Mac OS 8) USB plug and play, no driver required 9) Laser distance: >200m 10) Control distance: >25m 11) Dimensions (L x W x H): 12.1 x 2.5 x 1.45cm 12) Transmitter weight: 44g (including batteries) 13) Battery: AAA x 2pcs