Features:Whether you use a laptop, desktop or Windows 8 tablet, this is the only mouse you need.Bluetooth wirelessConnect to any Bluetooth® -enabled PC or Mac® computer or Windows® 8 tablet—no receiver required. It’s the one mouse you can rely on to work with all the devices you work on.Slim, ambidextrous designWhether you’re a righty or a lefty, whether you use a fingertip or palm grip, the M557 is always a perfect fit.12-month battery life*Enjoy exceptional battery life for a Bluetooth mouse, and work for up to a full year between battery changes, An On/Off switch helps conserve power, smart sleep mode extends battery life, and an indicator light helps to ensure that you’ll never be caught off guard.Windows 8 Start screen buttonA button located behind the scroll wheel makes it fast and simple to switch between the traditional Windows desktop and apps and the new, full-screen Windows 8 interface.Fully customizableYou can change the way each button works to suit your needs and preferences. Our powerful software works with Windows 8, older versions of Windows and Mac OS®.*Side-to-side scrollingThe wheel on the Logitech® Bluetooth Mouse M557 not only lets you scroll up and down through documents, you can also tilt the wheel left and right to move back and forth between web pages, open windows and apps.High-definition optical sensorThe 1000 dpi, high-definition optical sensor delivers smooth, responsive cursor control, so you can work with precision and confidence on a wide variety of surfaces.Specifications:System RequirementsBluetooth enabled PC running Windows XP, Windows 7 or Windows 8Bluetooth enabled Windows 8 tablet Mac computer running OS X 10.4 or laterPlatform CompatibilityWindowsMacPart NumberPN 910-003961

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General
Brand	Logitech
Model	M557
Wireless Protocol	Bluetooth 3.0
Wireless Range	Up to 33 feet or 10 meters
OS Support(at release)	Windows 7, Windows 8, Mac OS version 10.6.8+
Mouse Specification
Connection Type	Wireless
Sensor	Type: Optical Visible light: No
Scroll Wheel	Vertical scroll: Regular Left/Right tilt: Yes Tilt Wheel function: Scroll left/right
Battery Details	Removable Replaceable Size: AA Quantity: 2 Type: Alkaline
Battery Life	Up to 12 months
Body
Dimensions	2.28 in x 3.94 in x 1.34 in (5.8 cm x 10 cm x 3.4 cm)
Weight	2.12 oz (60 g)

In the box:
1 x Bluetooth Mouse 1 x 2 AA batteries 1 x Documentation

Warranty:
1 Year Warranty