3. Mode: Magnetic door "Ding" when opening the door 2. Anti-theft mode: Open the door immediately, ring and turn on the alarm for 30 seconds, even if the door is closed in advance, the alarm will sound for 30 seconds. Function: 1. Light Alert: The LED light flashes once when the button on the remote control is pressed and keeps flashing when alarmed. 4. SOS mode: find danger manual alarm press emergency key (S0S) sound and light alarm 30 seconds 5. Volume adjustment: independent volume "+" volume up key one step, independent volume "-" volume down key one step, Weight: 0.2535316013 pounds, Manufacturer: Faeymth