• Hand held
• FVC, FEV1, FEV1 and FVC (%FEV1) percentage, PEF, FEF25, FEF75 measurements
• Flow rate-volume chart, volume-time chart display
• Data memory, delete, upload and review
• Trend chart display
• Information prompts when volume or flow goes beyond the limits
• Automatic power off when there is no operation in one minute
• Rechargeable lithium battery and with charging tips
• Battery power display