Ledger Recovery Key is only compatible with Ledger’s e-ink touchscreen wallets, Ledger Flex and Ledger Stax and connects directly via secure NFC channels

Quotes that support claims

Designed specifically for Ledger's e-ink touchscreen products, Ledger Flex and Ledger Stax

The new recovery key is only compatible with the Ledger Stax and Ledger Flex products

Exclusively supporting NFC-connecting Ledger Flex and Ledger Stax wallets, Ledger Recovery Key connects directly to Ledger devices using secure NFC wireless channels with no intermediary