Overview Quiet Button Design Left and right buttons produce little noise when you click them. Perfect for public places such as offices, libraries, dormitories, internet Cafes where you do not want to disturb others or interrupt your concentration. Power Saving Mode and Power Switch off If the mouse stays out of work for 8 minutes, it will turn to power saving mode, press any button to restart it. If you turn off the PC or take out the Nano receiver from the USB port, press any button or move the mouse to enter the power saving mode. Specification Press-key Quantity: 7 Buttons(including scroll wheel) DPI: 800-1200-1600-2000-2400 Power Source: 1*PCS AA Battery(Not included) Package Content 1* Wireless Mouse 1*USB Receiver 1*User Manual Power Saving Mode and Power Switch off If mouse stays out of work for 8 minutes, it will turn to power saving mode, press any button to restart it. If you turn off PC or take out Nano receiver from USB port, press any button or move the mouse to enter the power saving mode. Ultra-Fast 2.4G Two-way Wireless Transmission Technology More secure and precise, the transmission distance can reach to 10 meters(approx 30ft). Advanced Energy-saving Chip Multi-stage power saving mode, less power consumption. There is a button at the bottom of the mouse, three options: ON, OFF, ON/light. Put it at ON/light, the LED backlight will light up. The cursor performs stably. With strong adaptive surface ability, this wireless mouse works fine on many surfaces.