Based on high-tech Bluetooth V4.0， this device is great for helping you track your lost belongings， such as key， cellphone， wallet and so on. It is highly compatible with cellphone， and functions well via the APP on your mobile device. Easy one-touch operation， bidirectional alarm， network search， multiple task management， location record and so on; this smart tracker will be a great helper for you. Most of all， designed into mini size， it is lightweight and convenient to carry and use. You should pay attention to our Nut Mini Multi-functional Intelligent Bidirectional Alarm Bluetooth V4.0 Smart Tracker!                                    Features             Smart anti-lost: When Nut mini is out of the safety range， your phone will beep to alarm you<br> Bidirectional alarm: When the phone is left behind and out of safety range， Nut mini and your phone will both beep to alarm you<br> One-touch find: Call Nut by pressing the " Beep" button on Nut App， Nut will beep for you to find it <br> Location record: Nut App will show you the location where and when Nut got disconnected on the map<br> Portable， can be put into the wallet， bag， etc.<br> Powered by CR2016 battery， keeps long-lasting working performance<br> Compatible for iPhone 4S or above and Android 4.3 or above  <br>                                                            Specifications            Brand    Nut    <br>Power    1 x CR2016 Battery ( Not Included )    <br>Bluetooth Version    4.0    <br>Operating System    iPhone 4s or Above !#!amp!*! Android 4.3 or Above    <br>Dimensions    (1.42 x 0.95 x 1.97)" / (3.6 x 2.4 x 5)cm(L x W x H)    <br>Weight    0.53oz / 15g    <br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br>                                                            Package Includes            1 x Tracker<br>1 x Strap<br>1 x User Manual<br>