... no driver required3. Power saving, lightweight, suitable for putting in your pocket or handbags4. Use ... About 49 feet 7. Switch: Button 8. Operating System: For Windows 98 / se /me / 2000 / xp / vista, ... no driver required3. Power saving, lightweight, suitable for putting in your pocket or handbags4. Use ... About 49 feet 7. Switch: Button 8. Operating System: For Windows 98 / se /me / 2000 / xp / vista, ...