SP70B Peak Flow Meter Handheld Digital Spirometer Mouthpieces Bluetooh App
(● Flow range: 0 L/s ~16 L/s. ● Flow accuracy: ± 5 % or ± 0.2 L/s (whichever is greater). 2) The personnel information (including height, age, sex, etc.) can be set. ● Working current: 200 mA. make sure you get the item safely.