S911-ST GPS Tracking Bracelet with Two Way Voice -The S-911 Bracelet ST Locator is ideal for a person with a cognitive disorder that requires a locking band. It can also be used for lone workers or security personnel. - SOS button. When pushed, the SOS button will dial a predetermined number establishing two- way communication. It also sends a text message, e-mail and notification on your LocationNow Dashboard in visual and audible alert. - G-shock. The G-shock is an accelerometer that detects sudden movements like a fall or an impact. It can be set to alert between 1  5g's. When the bracelet senses the shock, it will send a message by text, email and on your LocationNow Dashboard. If you do not want to use the G-shock, this feature can be disabled from your LocationNow Dashboard. - Geo- fence. On your LocationNow Dashboard, a geo-fence is established. One geo-fence can be set to alert on exit and multiple geo-fences can be set to alert upon entry. A geo-fence violation alert will come to you by text, email and on the LocationNow Dashboard. - Automatic answer. You can call the device and it will answer in three rings establishing two-way communication. - Alerts. When the bracelet sends out an alert, it then goes into real-time tracking. This means that it will be sending out signals updating the position of the bracelet until the alert has been cancelled. You can have alerts come by text, email or both along with notification both visually and audibly on your LocationNow Dashboard