Product details 

• Red laser pointer,black screen, ESC/F5, page up/down function
• Radio Frequency technology 
  
  
• USB plug and play. No driver requested. 
  
  
• Logo print available 
  
  
• Control distance: over 15M 
  
  
• Material: plastic
  
• Output power:classⅡ＜1MW,class Ⅲ＜5MW 
  
  
• Size: 30.8Dia MM
• Use 1 pc CR2032 battery 
  
  
• System:It supports Word,Excel,PowerPoint,ACDSee,Website.Acrobat,Readre etc. 
  
  
• For Teaching .meeting.speech.training etc. 
  
  
• System: windows 98/2000/ME/XP/Linux & Mac OS /win7/vista