Goldilocks and the three trackballs - Elecom Bitra (for travel), Deft Pro (daily driver and my gateway drug 6 months ago), Huge (birthday gift for a friend and what I hope will
Elecom DEFT Trackball
It is - M-DPT1MRBK track ball "DEFT PRO" (forefinger operation type)
Wired / Wireless / Bluetooth Finger-Operated Trackball Mouse, 8-Button Function with Smooth Tracking, Precision Optical Gaming Sensor (M-DPT1MRXBK) - Walmart.com
Wired/Wireless/Bluetooth Finger-Operated Trackball Mouse “DEFT Pro” – ELECOM US
Elecom Deft Pro: A Compact Finger-Operated Trackball - Bytethority
DEFT PRO Trackball Mouse, Wired, Wireless, Bluetooth 3 Types Connection, Ergonom | eBay
Wired / Wireless / Bluetooth Finger-Operated Trackball Mouse, 8-Button Function with Smooth Tracking, Precision Optical Gaming Sensor (M-DPT1MRXBK) - Walmart.com
Wired/Wireless/Bluetooth Finger-Operated Trackball Mouse “DEFT Pro” – ELECOM US