Elan SC1 RS232 Serial Controller With Power Supply and Accessories 146473716101 and will have rust spots

and will have rust spots

Manufacturer MOXA Model Number NPort 5150 SKU 19-15920 Ref 23-123786

Manufacturer Patlite Model Number LR4-302WJBW-RYG+FB254 SKU 19-69458 Ref 23-99330

Manufacturer EV Model Number R100 SKU 19-39390 Ref 23-51699

but when turning it up it needs to be pushed upwards or downwards while turning or it will not change value

Elan SC1 RS232 Serial Controller With Power Supply and Accessories 146473716101 and will have rust spotsCondition Used Description Item was recently removed from working service and is in excellent working order. Item will come with a 30 Day Warranty. Cosmetically in excellent condition showing minimal signs of previous use. Includes Serial Controller, Original Box, Ethernet Cable, Power Adapter, Quick Install Guide, and Screws as pictured. No additional items or accessories are included. Pictures are of one of the actual units available. Inventory is