Any quantity is acceptable for your order. And the price is calculated according to Specs/Size/Quantity of each of your order, it is negotiable for large quantity.
Quality is priority. Qunmao always attach great importance to quality controlling from the very beginning to the very end. We focus on every detail, our products accept CE,RoHS,FCC authentication,etc.
Normally we offer 1 year free warranty but whole life time technical support. After 1 year, components would be charged if any mulfunctions occur on the device. The repair rate of our products is controlled below 5‰.