1. How can I get a sample? The sample will be shipped out in 7 working days after we received your payment if no special requirements. 2. How to ensure the products’ quality? Samples will be sent to you for test firstly, each product stage will show you in time, the product quality will be test and show you before delivery. 3. What is the sound level of your machine? The sound level is less than 45dB. 4. Can I customize it? Sure,OEM/ODM are available. 5.Environment temperature: 0--40℃. 6. Relative humidity range : ≤80%. 7. Atmospheric pressure: 86.0kpa~106.0kpa.