Type of Connection: Wireless Operating Range: 10 meters/32.81 feet; Interface: Wireless USB Transfer 2.4 GHz is the frequency. Optical photoelectric operation 1600 DPI resolution Two-way roller direction There are three buttons. A single AA battery The product weighs 60 g and measures 110 x 61 x 34 mm (4.33 x 2.40 x 1.34").