The ESL 1500 ZEM is a Zone Card for an ESL 1500 Series Fire Alarm Control Panel. Old Style and New Style cards have no mechanical or electrical differences. 

The dual Zone Expander Module provides alarm and trouble indicators for two initiating zones with a disconnect/walktest switch for each.
This part is also eligible for a $50 core return refund. After you replace your panel, send us the damaged one and receive a refund back to your credit card, a payment through PayPal, or a store credit.
Please note: All parts should be installed and tested by a certified fire alarm company.