Wireless Battery FREE Mouse & Pad Worlds 1st Battery-Free Optical Mouse - derives its power from the patented RFID-Pad. Wireless optical technology delivers high resolution with pinpoint accuracy. Enjoy a clean organized environment because there are no tangling wires to interfere with your computing experience. Designed with Innovative Radio Frequency Identification Technology, this Battery-Free Wireless Optical Mouse is absolutely Interference-free from any wireless frequency. The RFID Mouse Pad is directly powered from the computer and the mouse creates huge cost savings for its users. The mouse pad transfers instant & constant power to the mouse as a replacement of batteries. This technology avoids unnecessary pollution caused by disposing used batteries into landfills. Mouse pad diameter is 8.86 inches, giving you a 360 degree area for your mouse. Vertical Scroll - Use the index fingertip to scroll the vertical scroll back and forth. Horizontal Scroll - Scroll the page horizontally by using the middle part of your index finger and move to the left and right. Mouse High Optical Precision Resolution Package Contents Battery Free Wireless 2-Wheel Optical Mouse RFID Mouse Pad iOffice2wheel CD included Product Dimension Mouse: 4.5"(L) x 2.6"(W) x 1.4"(H) Mouse Weight: 0.22 Ib. Mouse Pad Diameter:8.86 in. Mouse Pad Weight: 0.47 Ib. Package Weight: 1.04 Ib.