Silent switches reduce click noiseSwitch between Bluetooth 3.0, 4.0 and 2.4G1300 DPI tracking engineIntelligently switch among multiple devicesErgonomics DesignUp to 9 months battery life2 Years WarrantyProduct descriptionSilent switches reduce click noise. It simplifies complicated cross-platform use and meets multi-tasking requirements. Up to 9 months battery life: With Rapoo's energy saving technology and power switch, you can use your mouse without power interruption for up to 9 months. Ergonomic Design.BrandRapooColourGreyItem Height38 MillimetersItem Width6.1 CentimetersItem Weight54.4 gProduct Dimensions9.8 x 6.1 x 3.8 cmBatteries:1 AA batteries required. (included)Item model numberM100 SilentVoltage1.5 VoltsHardware PlatformWindows® XP/Vista/7/8/10, USB portIncluded ComponentsWireless Mouse, Receiver, 1 AA alkaline battery (pre-installed), Quick Start Guide