-Portable Peak flow meter-Test area 0-800,compact and easy to use for adult /child/adolescent patient population-Durable ,sliding zone indicators encourage patient compliance-Colorful integrated markers allow patients to easily monitor changes in air flow-Ergonomically designed plastic housing and tempered stainless steel vane are dishwasher safe -Reusable plastic mouthpiece attaches to unit for secure storageItem noMouthpieceTest areaQty/ctnHFB01Adult0-80050HFB02Child0-80050