Blockstream Help Center
Supported air-gapped functionality via QR
Official Blockstream Help Center reference for Jade Plus QR mode. It supports air-gapped interaction using QR codes, including device unlock, PSBT signing, Bitcoin address verification, SeedQR, multisig configuration, OTP records and message signing. The source explicitly states that QR mode supports Bitcoin transactions only and that Liquid requires USB or Bluetooth.
Why this source matters
Bitcoin Epoch uses this reference to support source-first Bitcoin education. The source is classified as educational material and helps readers verify claims outside the article body.