Weight without battery: 85g ± 10g 2.4G wireless connectivity through a USB-A dongle Three buttons that aren't programmable Power: 3,000 cycles, middle/encoder: 300,000 cycles, and left/right buttons life: 3,000,000 cycles DPI: 1000 Sensor: optical LED sensor Six months of battery life with an AA battery Ship group: AA battery *1, mouse, warranty, and user manual