A4Tech Battery-Free Wireless Optical Mouse consists of two parts: The Wireless Optical Mouse & RFID Mouse Pad. Designed with A4Tech's Innovative Radio Frequency Identification Technology, this Battery-Free Wireless Optical Mouse is absolutely Interference-free from any wireless frequency, in addition to that, the RFID Mouse Pad is directly power activated & the mouse creates a huge cost saving for its users.



Link: PCAbusers