2.4g mini wireless backlit keyboard with touchpad 1.2.4g 2.New style 3.100% silicone,waterproof,dustproof. 4.Protable 2.4g mini wireless backlit keyboard with touchpad ... environment:-20C to 55C Humidity:20%-50%Adopt 2.4GHZ frequency wireless transmission strong anti-jamming capability ... for daily use . Operation of Computer system requirements:Work with Windows 98, ME, 2000, XP, Vista and Apple ...