I am in the way to renovate my office. I was just thinking about installing some safety devices. Have you ever thought of the safety of your lone workers? There may be so many workers doing their job in the nights. I read an interesting article reminding that the safety of lone workers should be of prior importance. [ http://www.proteleccheckmate.com/blog/general-category/do-you-manage-health-safety-for-your-lone-workers/ ] There might be any emergency while they are not able to make a call for help. In such situations, this security system could help them by just pushing a single button. It allows a call to the service provider and also the employer could monitor the workers for any issues. Hope this would enlighten you all here and I have decided to take more care of the safety of my employees.