The socket will work with any USB Type-A connector to charge up to 2 devices at a time. Compatible with phones, tablets, fish finders and chartplotters. Tested and approved IPX4 waterproof rating with the cover closed and waterproof with 1, 2 or even 0 cables plugged. Our testing standard at Scanstrut is encapsulated by the acronym SCA, which stands for Safe, Certified, and Approved. With over 35 years of experience and expertise in designing products for outdoor use, we design our products to be able to thrive in the harshest of outdoor environments.