In 1 Thessalonians 4:16, the Lord descends with a loud command, the voice of an archangel and what?

Answer: The trumpet of God

The Lord Himself will descend from heaven with a loud command, with the voice of an archangel, and with the trumpet of God.

“For the Lord Himself will descend from heaven with a loud command, with the voice of an archangel, and with the trumpet of God, and the dead in Christ will be the first to rise.”— 1 Thessalonians 4:16 (BSB)