Addison Technology professional trackball
- Ball weight 3 oz
- Ball diameter 2 inches
- Sensing Mechanical
- Resolution 300 dpi
- Tracking speed Up to 600 mm/s
- Interface 9-pin serial (RS-232 DE9)
- Price $15 (1994)
- patreon me $5
- amazon egift card to xah@xahlee.org , $20 is nice.
- paypal to xah@xahlee.org , $20 is nice.
- bitcoin me 19dfoa3Q7oehm9MwCULQzBG8vqfCaeMazH
If you have a question, put $5 at patreon and message me.