President Joe Biden will announce his plan Tuesday to purchase 500 million at-home rapid COVID-19 tests that will be available for free to Americans.

In an attempt to combat a surge of cases through the winter, the tests will be available beginning in January and the administration will set up a website through which Americans can request a test, a senior administration official said. The tests will be delivered to citizens’ homes for free, though details such as how many tests one household can request are still being sorted out.

Biden also plans to announce the mobilization of 1,000 extra troops for hospitals overburdened by COVID-19 patients. While the troops won’t necessarily be immediately used, an official explained that they’ll be available “if we do” end up needing them in January and February.