Using a unique negative pressure system, sputum suction household. Small size, light weight, easy to carry. Safe and reliable to use, no harm to human body. Suitable for the elderly, cough and sputum use. Sputum suction pump can be cleaned and reused.featureOil-free piston pump, strong inner core, long-term operation and maintenance-freeHigh negative pressure and low flow rate protect the patient's larynx and mucosa from harmHidden buried liquid storage bottle, built-in anti-overflow device to prevent overflow of viscous liquid into the bodySmall size, light weight, easy to carry, suitable for outpatient visits and emergency situationsProduct Specifications:Product name: portable sputum aspiratorInput power: 90VAPumping rate: 15L / minLimit negative pressure value: 0.06MPaNegative pressure adjustment range: 0.02MPa to the limit negative pressure valueNoise: 65dB (A)Dimensions: 37 × 18 × 28cmPackage Contents:1 * Sputum suction device2 * hose1 * air filter1 * suction flexible catheternote:* This product is non-professional medical use and belongs to auxiliary equipment.* Check the machine electrical safety index regularly.* When the machine is powered on, no one is left unattended.* Turn off the power immediately after each use.* Do not reach for the machine that has fallen into the water, first cut off the power immediately. Do not place or store the machine where it is easy to drip water or other liquids. Do not touch the machine when it is wet.* Do not block the air vent of the product, and avoid soft cloth, fluff and the like at the vent.* Do not drip or insert any substance into the orifice of the machine.