This is a used Arroyo Instruments 5235 TEC Source, a precision temperature controller capable of 3.5A and 7V output, featuring USB and RS232 interfaces for integration. It is designed for accurate thermal management in laboratory, research, or industrial settings. The unit supports stable temperature control for components like laser diodes, optical stages, or small thermal platforms. It is a suitable choice for engineers, researchers, or technicians requiring reliable device communication via standard serial interfaces. Free shipping is included for this used item, which has been tested for functionality. Check the listing for full details on its operational history and any included accessories. Arroyo Instruments 5235 TEC Source 3.5A/7V USB/RS232 Interface. Condition: Used. Listed at 799.00 USD. GREAT CONDITION. FROM A SILICON VALLEY RESEARCH LAB ACCESSORIES: North American power cord 001