Key Connection Battery Free Wireless Optical Mouse & a USB 2' Wired Pad (WLBF20) 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, it 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 Battery Free Wireless Optical Mouse and a USB 2 ft. Wired Pad - Does Not Use Batteries Totally Green Environmentally Friendly Solution This is an aftermarket of generic part