Microcomputer design Viewable, audible, recordable, playable auto-dial to send out distress signal Select NC/NO or voltage input event-trigger according to various panels Store four groups of landline phone numbers or cell phone numbers, each group can store up to 16 digits and second-class password If triggered by accident, you can always use the keyboard to control by inputting password to stop rescue signal Compatible with all kinds of anti-theft panel or used with all kinds of sensors Payment Details: Payment Terms: T/T or L/C at sight Delivery Details: FOB Port: China (Mainland)