SD™ Card Door for GPSMAP® 840xs, 1020xs & 1040xs Secure and protect the memory card in your compatible marine device with this SD door. Warning [https://productimageserver.com/prop65/6pt.png]WARNING: This product can expose you to chemicals which are known to the State of California to cause cancer, birth defects or other reproductive harm. For more information go to P65Warnings.ca.gov [http://P65Warnings.ca.gov].