Measures accurately in any position on the upper arm - Suitable for arms with circumference of 22-42cm - Compatible with Omron M7 Intelli IT BPM, Omron M500 Intelli IT BPM, Omron M700 Intelli IT BPM, Omron M4 Intelli IT BPM, Omron M400 Intelli IT BPM, Omron M6 Comfort BPM, Omron M500 BPM, Omron M3 Comfort BPM, Omron M400 Comfort BPM, Omron M400 BPM, Omron X7 Smart BPM, Omron X4 Smart BPM and Omron X3 Comfort BPM - 1 year warranty as from date of delivery