TESTED WORKING: Controller powers on, displays a pH reading, and responds during testing.

Condition:

- Pre-owned with cosmetic wear and marks from aquarium use and storage.

- Used MA911 probe is included. It should be calibrated with fresh pH standards before use and, like any used pH probe, may eventually require replacement.

Includes only the pictured controller, probe, power components, and attached cables. No calibration solutions, mounting hardware, manual, or other accessories included.

Please review all photos for exact condition and contents.