Office Optical 4000 DPI Graphite Left-hand RF Wireless + Bluetooth 10 m Scroll type: Wheel Buttons quantity: 4 Power source: Batteries 1 AA Alkaline Mouse Bluetooth Low Energy (BLE) Yes Multi-device support Yes Customizable movement resolution Yes Silent click Yes Buttons durability (million clicks) 5 Button functions DPI switch, Forward, Back Number of programmable buttons 4 Programmable mouse buttons Yes Buttons type Pressed buttons Buttons quantity 4 Scrolling directions Vertical Number of scroll wheels 1 Scroll type Wheel Movement resolution 4000 DPI Movement detection technology Optical Device interface RF Wireless + Bluetooth Purpose Office Design Surface coloration Monochromatic Product colour Graphite Vertical design Yes Ergonomic design Yes Form factor Left-hand Ergonomics Wireless range 10 m On/off switch Yes Power Service life of battery 24 month(s) Battery technology Alkaline Battery type AA Number of batteries supported 1 Power source Batteries System requirements Other op