Tonor 2.4GHZ Optical Wireless Mouse USB 2.0 Receiver for PC/MAC Blue Auto-power-off of the USB receiver inside the mouse when not in use.Very comfortable shape and feel. Intelligent connectivity, no need to code, plug & play. Powered by 1 x AA battery(NOT INCLUDED). Environment friendly with low power consumption. 2.4GHz wireless transmission Difference from Tonor Wireless mouse with others on Amazon:1. Well packed with Tonor branded plastic bag.Perfect gift for friends and families.2.Higher quality,longer life time.More than 2 years.3.12 months warranty offered, no worries buying.