analyzers hd-s1 bus system alarm controller

welcome to our store, we mainly send it directly from the factory we are devoted to offer products with reasonable wholesale price and fast delivery. we check the quality of each piece so the product quality is very good the price is very favorable please check the size information before you place the order,all dimensions are measured by hand,there may be some little deviations. hoping you are understand it,our service is also very good we hope to be friends with you can cooperate for a long time hope you have a happy life thank you..syi