As an experienced and professional manufacturer of electronic products with 13 years, we have advanced product line and a strong team of R&D and managing stuff to handle with the whole process including product design, manufacturing and sale. We always pay attention to product quality and cost control, so that we can assure our products to have excellent performance and price. What is more, one of our principles is to provide prompt delivery and service. Currently, we sell our products well in China Mainland, Hong Kong and Southeast etc. We rely on reasonable price and top quality to gain the markets. Now we have passed ISO9001 approval, and we can make our products under different international standards such as CCC, CE and so on. The following item is the king tone, which has 20 melodies ,when it ring , and it is battery operation , the longest distance up to 100-150M ,