Mi-Zone is a 2-way proximity alarm that works together with your Android handset or tablet. It is a unique device that you can attach to anything you consider valuable or worth protecting. It does not need a mobile phone signal for it to work. As long as your Mi-Zone tag is charged, it will always work. You can choose from 3 security settings: Low, medium and high, depending on the range of the security zone you wish to create around the item you wish to protect. Mi-Zone is compatible with Android devices.