Battery Free Wireless Optical Mouse and Pad (Round) with Vertical and Horizontal Scroll Wireless BatteryFREE 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 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. his 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. With OfficeJump Switch, select up to 8 out of 24 various office command sets such as Copy/Paste, Delete/Reply All, and Zoom in/out. The 2nd wheel offers 4 quick functions: H-scroll, zoom in/out, page up/down, pre/next doc.