The official Raspberry Pi mouse is a three-button optical mouse which connects via a USB type A connector either to one of the USB ports on the keyboard or directly to a compatible computer.
Specification Mouse
• Three-button optical mouse
• Scroll wheel
• USB type A connector
• Weight: 105g (110g including packaging)
• Dimensions: 64.12mm × 109.93mm × 31.48mm
• (115mm ×75mm × 33mm including packaging)
