GE 51107 Smart Home Wireless Alarm System Kit for $19.97. Shipping is free on orders over $45. If needed, use this Filler Tool to pad the order to qualify for free shipping. Here is a screenshot for your reference. Alternatively, it is available at Amazon for $23.29 with free shipping on orders over $25. This alarm kit features a door alarm with a four-digit keypad for entering a custom code, 3 window alarms that requires no wires or drilling with 120-dB alarms for warning. Most places have this GE 51107 Smart Home Wireless Alarm System Kit for about $34.