Sony VAIO Bluetooth Laser Mouse for P Series Lifestyle PC (Green) Battery life is approx. 3months (AA alkaline batteries) Sensor resolution is 800 dots per inch Interface is bluetooth standard ver.2.0 Color perfectly complements your P Series notebook Buttons/Wheel: Two-button/One wheel Color perfectly complements your P Series notebook Interface: Bluetooth standard ver.2.0 Buttons/Wheel: Two-button/One wheel Sensor resolution: 800 dots per inch Battery life: Approx. 3months AA alkaline batteries)