Boseng BP16SP11R Expansion Module 155261483072 but when you set the

but when you set the temperature setpoint and turn the unit on

but there is a small chip on the bottom

Manufacturer THK / Leadshine Model Number GR30 / 57CM13 SKU 19-68073 Ref 23-96962

Includes Crossover Board as pictured

Manufacturer Excelsys Part Number 633-1330-ND SKU 19-68637 Ref 23-97959

Boseng BP16SP11R Expansion Module 155261483072 but when you set theCondition Used Description Recently removed from working service and guaranteed functional. Cosmetically in good condition showing minor scuffs scratches blemishes from previous use. Includes Expansion Module as pictured. No additional items or accessories are included. Pictures are of one of the actual units available. Inventory is on hand and ready to ship. Please feel free to message us with any questions you may have. Specifics Manufacturer Boseng