This is a Hayward GLX-SD-ELEC-MOD Electronic Module for Sense and Dispense.
Specifications:
• PCB replacement
• Fits Hayward goldline sense and dispense automation models aqlchem, aqlchem2, aqlchem2-240, aqlchem-upg, aqlchem3-120, aqlchem3-240
• Also fits Hayward Goldline aqua rite pro salt chlorination and chemistry automation model aqr-pro
• Weight 1 pounds