JSB FXN520/R Bi-Wire Biwire Sounder Base.

For the original obsolete Biwire System (Not the ultra)

These items are used so they will have some wear.

We have thousands of other Fire Alarm Parts in stock,please visit our ebay shop.

All items are in stock and ready to send.

UK next day delivery service available if purchased before 4pm. 

Postage: each additional item is cheaper than the first item. click on "see details" in the postage section above. 

VAT is included in the cost of the postage.