42120 Rescue Hovercraft is comprised of 457 elements, and will retail for £29.99 / $29.99 / €29.99, while 42121 Heavy–Duty Excavator contains 569 pieces for £34.99 / $39.99 / €39.99.
In previous years, both of these models might have released in January, alongside other Technic sets including 42122 Jeep Wrangler and 42125 Ferrari 488 GTE AF CORSE #51. But the LEGO Group has changed things up for 2021, splitting early waves into January and March launch windows for Technic, Star Wars, Marvel, Friends and more.
That means you can still expect a flagship Technic set later this summer, at least if rumours (and prior release patterns) are to be believed. But these two smaller sets should still fill a hole for Technic fans who perhaps don’t have the budget or space to display a huge CAT D11T Bulldozer or Mercedes-Benz Zetros.