Single channel Smart GSM SMS Alarm box Home security alarm system, Mini and one battery on board for Main power failure alert DC5-15V Power input, One Alarm input, SMS alarm message would be sent to maximum 6 preset mobile phones when any alarm input triggered When input is shorted to GND,then trigger the alarm Alarm SMS can be customized with your Text Very smart and slim designed gsm box , can be easily mounted to other target system board to add the gsm alarm features. customized design the GSM Alarm box according to your requirments with free of charge, Support SMS alarm ,phone calling alarm, Rechargeable battery on board for power failure alert, One alarm voltage output ,that can be used for siren Packing list: 2 pcs GA01P alarm box with antenna, 2 pcs Rechargeable battery inside, 2 pcs sample Mini audio siren for test GA09 Green terminal for DC5-15V Power input What can GA01P do for vending machin? 1. Monitor the vending machine or game machine power supply. When power supply failure,then can send the alert sms. (On board rechargeable battery for power failure alert) 2. connect a switch sensor to GA01P, for example and door magnet switch to monitor the cash box or vending machine door opener. When the door of the vending machine is illegally opened, an alarm message can be sent. (One alarm input ) 3. We have an alarm voltage output , when alarm happen, have a voltage output,that can be used for siren. (One voltage output during alarm) Color: As Shown Material: plastic Package Contents: 2 x Intelligent power failure alarm 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.