Product brand: AJAZZ ajazz AJ129 Image sensor: PAW3327 Product size: 119mmx63mmx38mm Product weight: 65g ± 5g Number of keys: 7 DPI adjustment: 200-12400 (7 gears can be customized) Support operating system: Windows 98 / 2000 / me / NT; Windows XP; Vista / 7 / 8 / 10 / Mac OS, mac