The Welch Allyn Tycos® 767 Wall Aneroid has great looks and clinical-grade accuracy. It is certified accurate to ±3 mmHg and is mercury-free and latex-free for safety. It has ruby-jeweled movement for long life and a laser-engraved dial face for accuracy. The dial face is large (6.25") and easy-to-read. The Tycos 767 Wall Aneroid has a built-in cuff storage basket and comes with a Durable One-Piece Adult Cuff.