Q1: What is the best advantages of the product --Extra Fine particles, large rate,Rapid alveolar absorption. --Don't be afraid of blockage,The dual channel can be alternated . --1 >2,deePNebu has real value of dual channels, dual chamber, --dual modes (kids and Adults)and dual power supply. --Hidden battery, type-C power supply port, waterproof and safe. --One button smart switching mode (children and adults). Q2: How to buy your products? You can place order to our company directly on alibaba, or contact our salesperson for help, they will confirm order details like product configuration, shipping matters etc with you, and give you guidance for all process from purchase to arrival of your goods. Q3: What's the payment mode? We accept payment by T/T Bank Transfer, Alibaba Trade Assurance Service, Cash etc. Q4: What's the delivery time and shipping method? Delivery time is upon to your ordered product and quantity, generally our lead time is within 1 week, if have stock we can ship immediately. We have long-term cooperated forwarder for worldwide shipping, we can deliver your products by express, air freight or sea freight, different shipping way the (cost and time is different, we will give sincere advice according to your situation and you can decide, for many countries we even have door-to-door shipping service which include customs clearance and taxes. Q5: What's your after-sale service? We provide at least one year warranty for all our products(consumables exception), If there is any fault for our products, we have well-trained and passionate after-sale engineers to help you; after warranty we still provide lifetime technical support, if spare parts needed just charged at cost price. Q6: How do we secure transactions? We SUNRISE is a professional medical company owned a lot of government certificates, and also Alibaba verified us as Premium Supplier there. Our company is aiming to serve more and more customers in the world, providing you good quality medical products, and more safe payment ways like through Alibaba Trade Assurance.All transactions between you and us is 100% guaranteed, you will enjoy our whole-hearted service all the time Q7: About battery power? --For children mode, the nebulization rate is between 0.23-0.32mL/min, and the consumption is very lower. 6-7 days can be used, 3-4 times a day. --For the adult mode, the nebulization rate is between 0.3-0.6mL/min, and the consumption is relatively large, depending on the use frequency. Q8: Why does the nebulizing time set to 5 minutes? Avoid children's rejection of long-time nebulization and waste of medicine. At the same time, the nebulization time should not be too long. It is necessary to timely expectorate the sputum accumulated in the respiratory tract. Q9: Why do clean and disinfect in time? --Avoid residual crystallization of medicine and blockage. --Avoid cross infection and contamination of new drug solution. --If it is not cleaned thoroughly, it is easy to breed bacteria, which may aggravate the disease. --Clean it in time and keep it dry. It can be used for a long time, saving time and unnecessary trouble