这是一款老化新型的小型继电器的装置，连续老化次数为5万次，并有自动检测部品状态，自动复位部品状态，功能稳定。对学习164的用法和数码管扫描的人大有好处！-This is a new type of small aging relay device, for the aging number of 50,000 times, and has automatic detection components, and automatically reset the status of component