17/07/2014 16:13Looking for new and advanced products for protect your premises? Check the Arrow electromagnetic door closer unit now! Today, we start a new series of two videos about this useful supporting feature for fire systems. We are glad to introduce you to our friend Mark, an expert in housing and building security issues. Mark will explain to us the Arrow electromagnetic door closer unit functioning and further details about the product additional accessories. We'd love to know your opinion about it. Comment and share!