"Description: The wireless mouse is cost-effective way. The shape is ideal for any user. This mouse provides a qualified and durable solution that exceed the expectations of its value pricing. Features: * 2.4GHz Free moving in 10 meters * 16 automatically switchable working frequency and over 60.000 groups of secure encoding to free external interfere * Nano super Mini receiver.Plug-and-Play * Built-in storage medium,no need re-code after you replace battery * Resolution frequency 800-1000-1600DPI conversion * Built-in Mini receiver design * Power On/OFF function * Energy saving technology.2 pieces of AAA alkaline battery supply over 3 months working time. * Low-Voltage alarming function * Operation spam will be affected greatly due to using environment * Battery life spam will be different, depending on personal habit of using mice Specifications: 1. Power Supply: 2 x AAA Batteries (Not Included) 2. Mouse type: Wireless Optical Mouse 3. Interface: USB 4. Button: 5 Buttons + 1 Scroll Wheel 5. Resolution: 800 to 1600DPI 6. Supports: Windows 2000/XP/Vista/ME 7. Size: 3.94"" x 2.36"" x 1.38""(L x W x H) 8. Weight: 4.09 oz 9. Rated working Voltage: 3.0V 10.Rated working Current: 15mA 11 Color Black Gray Blue Silver Red Package Includes: 1 x 2.4G Wireless Mouse 1 x Mini Receiver"