You are bidding on a Nice Biosystems Inc. Personal Portable O2 Monitor, Model 3100 with carrying case.

Operates on 9V battery supplied.

Unit power ups and displayS 0.1% Oxygen.

Includes all items as shown.

I will guarantee this item.

Shipping in the Continental US is $7.90 - I have very competitive rates for our always welcomed International bidders.

Thanks for looking! If you have any question on this item please call us at 1-800-826-3433 (9 - 5pm Eastern).