- Robust and hardwearing
- Features comfortable integral mouthpiece
- Suitable for adults and children
- Suitable for multi-subject use with SafeTway mouthpiece
- Variable orifice simple mechanical peak flow meter
- Better than 5% or 10 L/min whichever is greater repeatability
- Better than 5% or 10 L/min whichever is greater inter-instrument variation
- Daily record chart included
- Piston/spring and moveable pointer measuring principle
- A/B difference less than 15 L/min/15% frequency response
- Multi-language instruction sheet