Full Range Peak Flow Meter- Personal Best- Respironics HS755012- 1 Ea Full Range: 60-810 Liters/Minute. With Asthma Management Zone System. Contents: 1 Unit, Instructions for use, Daily record char and Companion card Lightweight, Self-contained, Portable design. Rugged construction allows easy sterilization. Dishwasher-safe. Features Oval mouthpiece, Built-in handle and Easy-to-Read scale.