There will be strict test for each product by the quality inspection department once it's produced, our products has 3 months warranty period. If any non-man-made quality problems take place during this 3 months period, we can offer a free exchang for new product. Kongsberg OEM 1.We can only offer you retail price when order quantity is less than 300 (total order number, not just limited to one type of product). 2.If the order quantity could be more than 300 per order then we can offer the wholesale price rather than retail price. （total order number, not just limited to one type of product） 3.If total order quantity in 3 months is equal or more than 300, you will have wholesale price (total order number, not just limited to one type of product). 4.You are welcome to join us and become our agent. Once your are one of our contract agent in your country (or a spectific area), we will not sell our product to anyone other than you in your contry(or the spectific area). We accept ...[More]own designs and OEM design orders