Suitable for arms with circumference of 22-42cm - Compatible with Omron M2 Basic BPM, Omron M1 Basic BPM, Omron X2 Basic BPM, Omron M2 BPM, Omron M300 BPM, Omron M400 BPM, Omron MIT5s Connect BPM, Omron M2 Classic BPM, Omron M3 Expert BPM, Omron M3 Family BPM, Omron M3 BPM, Omron MIT3 BPM, Omron OA3 BPM, Omron M6 AC BPM, Omron M500 IT BPM and Omron M6 BPM