Upgrade free installation Appearance is like decoration, no GPS recognition, no need to install, if there is an abnormality, it will only remind your mobile phone Work without any light and sound, silent work, can be placed in a conspicuous place Just bind the use number on the APP, the machine has no switch, if you need to switch the machine You need to operate the command on the APP. The machine can be turned on and off regularly It is not affected by daily splashing water or wearing in rainy days, just wipe it dry (do not soak in water) Upgrade from the inside to the outside, charge for more than 10 minutes, and the machine will automatically turn on. When the battery is below 20% The device will send information to the APP, prompting a low battery alarm. The device will automatically record 180 days of historical track, you can use the computer IPad or mobile phone Log in to view the stay time, action track, all information at a glance Help you find lost family members faster Set the electronic range on the APP, when the object is out of the set security range Real-time reminders to your phone