WIRELESS DETECT SWITCH
Model : DS-121
* DS-121 is the standard accessory and the optional accessory of GSM-120.
* Two wireless detect switches (DS-121) are included in each set of GSM-120.
* User can install the DS-121 on the door or window easily. When the thief interrupt the house,
buzzer will sound and send the SMS alarm message to the mobile.
Singapore
