Mice & Trackballs Wirele Trackball Mouse Ergonomic Right Left Hand Wired Mouse USB Optical Handheld Air Laser Mice For PC Tablet Laptop Computer Specification: Material: Plastic Scrolling Type: Scroll Wheel Pointing Device Host Interface: USB Mouse Size: 110*60*50mm Power Supply: 1 x AAA Battery(Not included) Net Weight: 0.15kg System support: Windows 2000, Windows XP, Windows 7, Windows Vista, Windows 98, Mac OS, Windows ME, Windows 8 . Windows 10, etc Feature : Portable finger trackball mouse -with off-table design for free and comfortable operation. It is ideal for laptop users. It can greatly ease the harm of palm joint or muscle for long time using mouse Avoid sitting closely to the monitor and reduce the harm of radiation and eye fatigue Dolphin shape design with left/right clickers fit left and right handed users. Plug and play, no software required The thumb operated trackball combines reliable optical technology with an innovative scroll wheel that acts as a third button With the function of laser pointer,best choice for Teaching,Conference, Speech. Plug and play, compatible with windows operating system and Linux, Unix, Mac systems, etc. How to Use: 1. Put your index or middle finger into the hole of this mouse. 2. Control the track ball for moving cursor and pre the right and left button with your thumb 3. When using "Drag and Go" function, pre the button in the hole of the mouse that has the same function as the left button of the common mouse 4. Use the left button to lock the screen and then you can control the track ball to roll your screen freely Notice 1. This mouse is divided into 3 styles: wired, wirele, and wirele with laser prompt 2. Wired style is about 1.8 meters in length, and wirele style is about 10 meters away. 3. The bottom of the mouse is magnetic, which can absorb the USB receiver to avoid losing the receiver when it is not applicable and easy to take Package included: 1 x Mouse (Battery not included) 1 x USB Receiver Wirele Laser Mouse: 1 Wired Mouse: 2 Wired Mouse: 3 Wirele Mouse: 4 Wired Mouse: 5 Wirele Mouse: