1. Is this product ultrasonic humidifier?2. Is this product can be convert to 110V?3. How much does this product cost?4. Is there any metal materials inside in this product? especially where the water around? (for example: using metal spring to protect from the water backward flow)5. (from question 4) If using a metal materials, is it possible to substitute to use other materials?6. For the Trading condition, we are willing to have with: 1st lot: 100pcs (as a sample trial), C&F TOKYO, by LCL shipment. from 2nd lot: 200-300pcs, C&F TOKYO, by LCL shipment7. If there is additional information, or terms and conditions, could you please give us the information?