1 PCS
<br />1 x Wireless USB Optical Mouse
<br />1 x USB receiver
<br />Interface: USB 2.0
<br />The mouse size ordinary mice (100-120 - mm)
<br />High Resolution:1600-2000DPI
<br />Mouse Power : 2 × AAA Batteries (not included)
<br />Wireless transmission distance: 10 m or more
<br />Wireless carrier frequency: 2402 MHZ to 2480 MHZ
<br />Work wireless channel: 16, automatic frequency hopping
<br />The rated working current: 8 to 15 ma @ 3 v
<br />Key stroke: 0.8 mm
<br />Note: The USB Receiver is packaged in the Mouse, open the battery cover then you'll see it (As the picture show).