Features: 100% brand new and high quality. 2.4GHz wireless provides a powerful and reliable connection, convenient to use. Slim ergonomic design will fit in your palm, comfortable to grip and avoid tired. With 4 keys, include scroll wheel, page forward/backward buttons for easy Internet surfing. Portable and weight light, very convenient to carry and store. Specifications: Material: Plastic Power Supply: 2* 500-1200mAh AAA battery(Not Included) Interface: USB Output Voltage: 1.5V Wireless Technology: 2.4GHz Wireless Distance: 10 meters Button Number: 4 buttons Package Include: 1 * Wireless Mouse 1 * USB Receiver Wireless Mouse：2.4G wireless mode is suitable for these computers with one USB port.It provides a reliable connection within 10 meters; the cursor is smooth, prompt and accurate. USB receiver is inserted next to the battery compartment of the mouse. You need to open the top cover of the mouse. Note: 1 AAA battery required, but NOT included. ONLY 1 AA BATTERY IS REQUIRED：This battery mouse can be powered by only 1AA battery (not included), and due to special chips, it will enter auto power-saving mode after 1 minute of idling, or enter sleep mode after 8 minutes of idling, which makes this laptop mouse a much longer battery lifespan (up to 15 months). 3 Adjustable DPI：3 DPI levels (1000-1600-2400) allows you to change the cursor sensitivity easily and track more smoothly over a variety of surfaces.It can meet both ordinary and gaming needs. Optical laser allows for quick response, precise movement, and smoother tracking. PORTABLE & ERGONOMIC DESIGN：The symmetrical and ergonomic design conform to your hand and is naturally comfortable, so you won't feel tired even long-term use. At the same time, the compact size of this slim portable mouse makes it easy to take with you wherever you need it, at home, at work, or anywhere, providing an incredible user experience. Auto Sleep & Saving Energy：The wireless mouse will automatically enter sleep mode to save power if in no use for a few minutes. Click any buttons to awake it.