USB Wireless Optical Desktop Mouse, Programmable Six Buttons with Scroll Wheel, 800dpi - Manhattan 176958 USB interface Right and left mouse with scroll wheel, page forward, page back and auto-scroll buttons Automatic power save/power off mode USB receiver: 27 MHz (256 IDs); 9.7 x 8 x 6.5 cm (3.8 x 3.1 x 2.5 in.); 56.7 g (2 oz.); cable, 1.5 m (58 in.) Mouse: 13 x 8.5 x 4 cm (5.1 x 3.3 x 1.6 in.); 147.4 g (5.2 oz.)