Due to State and Federal Law, we sell Syringes and Needles only to the Medical Facilities. Automatically adheres/adjusts to patient?s natural breathing cycle * Meets or exceeds 3:1 conserving ratio in conserving mode * Superior sensitivity * No battery needed * Weighs 13.7oz. and is 4 3/4" in length * Streamlined, contoured thumb wheel flow indicator for easy-to-read display and accessibility * UL approved contents pressure gauge * Conserving mode offers settings equal to 2, 3, 4, 5, 6 LPM * Continuous mode offers approx. 2 LPM at setting 2 * Canula usage: Standard 7" nasal single-lumen cannula * 2 Year Warranty *