Sensors, electrical controls, various. 11 each. 24-240vac for three, balance are 24vdc. 3 with no cables, balance have attached cables, wiring. 6 are reflective, retro; balance are proximity sensing. Great for mechanical, controls or projects. Used for 30 days in test of prototype, stripped off 5 years ago, stored. All powered up fine and responded to targets and 6 with adjustments operated to same.