1. There Are Multiple Reminder Methods For Remote Alarm. When The Accessory Detects An Abnormality, It Will Send A Signal To The Host. The Host Will Alarm Loudly On Site And Automatically Make A Phone Call Or SMS Alarm. 2. You Can Check The Scene Through The Camera! 3. Notify Multiple People, Do Not Miss Every Alarm, 6 Groups Of Voice Alarm Calls, 3 Groups Of SMS Alarms, Multi-person Alarm Notification, 4. Scheduled Arming And Disarming, One-time Setting, Easy To Use, Eliminating The Need For Frequent Manual Operations 5. The Trouble Of Arming And Disarming Makes The Alarm More Intelligent<br><br>Product Name: WIFI GSM Anti-theft Alarm System Power Input: DC12V1A Built-in Backup Battery: 3.7V BL-5B Rechargeable Lithium Battery Backup Battery Charging Time: Turn The Battery Switch To "ON" And Charge For 10 Hours. Fully Charged Standby: 8 Hours Siren Alarm Sound: Wired 120dB (factory Default Alarm Sound Is 180 Seconds) Host Receiving Frequency: 433MHz ( 75KHz), PT226214.7MQ Host Transmission Frequency: 315MHz ( 75KHz), PT2262/4.7MS2EV1527/300K Colour:White Material:ABS<br><br>Package Contents: 1 set * anti-theft alarm<br><br>Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.