It is a assembled kit of Fire alarm based on Thermistor (If you need in Kit form for self assembling in practicals /experiments please Msg me before order) . The circuit includes the circuit diagram , layout design with components side for easy understanding of circuit. The circuit sense the heat from any external source or fire by use of Fire sensor , then the alarm switch on through the sensing circuit in the alternate buzzer tone with flashing of LEDs for alert. This circuit is 9V battery operated by use of inserting the jack. You can also use a transformer of 6 to 12V in stead of battery as per your practical requirements.