So this is the 1st module in your timer. This comes with the timer when you buy it. This will NOT add zones to your system. This just replaces the 1st mod in case it goes bad. Lightly used and tested. Im not responsible for longevity or performance of this product after purchasing aside from its basic functions. I typically do not accept returns but in this case, if it doesn't work right after you install it...installed correctly, locked, programmed, etc...just message me and we'll work through it. Refund you or replace it.

Im confident it works as it should.

Please ask questions and request pics before you buy if needed.

Shipping is based on location or free