Secure Meters 952034 Wi-Fi Card for C1727 & H3747 Kits(SCW100-000). Wifi card simply fits into the programmer from the C1727 & H3747 kits to allow connection with the Secure Meters mobile app. 
 
C1727 & H3747 can be found here:
 
 https://www.electricalsonline.co.uk/product-page/c1727 
https://www.electricalsonline.co.uk/product-page/h3747