Office Optical 7200 DPI Black, Silver Left-hand RF Wireless + Bluetooth Scroll type: Wheel Buttons quantity: 7 Power source: Batteries/Cable 1.5 m Built-in battery Rechargeable Lithium Polymer (LiPo) 1100 mAh For CAD users who prefer or require a left-handed mouse. Offering precision and advanced ergonomics in a left-handed body. CadMouse Pro Wireless Left comes with a multilayer carrying case with a soft foam interior and an ultra-resistant hard shell exterior, for maximal protection and durability. Mouse Bluetooth Low Energy (BLE) Yes Frequency band 2.4 GHz Polling rate 90,125,1000 Hz Adjustable polling rate Yes Buttons type Pressed buttons Buttons quantity 7 Scroll type Wheel Movement resolution 7200 DPI Movement detection technology Optical Device interface RF Wireless + Bluetooth Purpose Office Design Product colour Black, Silver Ergonomic design Yes Form factor Left-hand Ergonomics Plug and Play Yes Cable features Braided Cable length 1.5 m Power Service life of battery 2 month(s