Features: The temperature-sensitive fire detectors is designed to quickly detect changes in ambient- temperature and alert- occupants of potential fires-. Equipped with advanced thermal sensing technology, this fire detector can accurately measure even the slightest increase in temperature and trigger- an alarm. This heat detector is ideal- for use in areas where smoke or dust may interfere with traditional smoke detectors, such as kitchens or workshops. With its reliable and sensitive detection capabilities, this fire alarm is an essential- safety feature for any home or business. Easy to install and maintain, this temperature-based fire detector provides peace of mind and protections against the devastating effects of fire. Specifications: Material: ABS- Diameter: approx 10.5cm/4-inch Item size: approx 105x55mm/4x2.2-inch Package size: approx 10x55x145mm/0.4x2.2x6-inch Working temperature: -10+50 Relative humidity: euqal or less than 90%RH Power supply: 1x9V 6F22 battery(Not included) Note: Please allow 1-3cm error due to manual measurement. pls make sure you do not mind before you bid. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Package includes: 1xHeat Alarm 2xPlug 2xScrew 1xManual