Features: brand new and high quality Alarm function, the green light indicates that the body temperature is normal, and the red light flashes and an alarm sounds, indicating that the body temperature is abnormally higher ,you can set the alarm value yourself. Easy to install,use nails to hang or double-sided tape to stick to the wall.there is a tripod socket at the bottom, which can be fixed with a tripod; it comes with a USB cable, which can be plugged into a power bank or connected to a wall socket. if you need to use batteries, please purchase three AA battery/18650battery .(NOT INCLUDE) Multiple choices,the infrared thermometer has a digital display, supports 13 language prompts, adjustable volume, can easily switch C / F,has a counting function of 118 previous readings. Non-contact and fast measurement,the measurement distance is 5-15cm/1.97-5.91inches,the response for time is 0.1s,and the accuracy tolerance is 0.2. Widely used,wall-mounted thermometers can be installed in offices, supermarkets, shops, restaurants, apartments, hotels, community centers, building entrances and public places.non-contact measurement to avoid cross-infection. Specifications: Material:ABS Measure Distance: 5-15cm/1.97-5.91inches Response Speed:0.1s Accuracy Tolerance is 0.2 Temperature Storage:118 Note: Please allow 1-2cm errors due to manual measurement. Due to the difference betweeen different monitors,the pic may not reflect the actual color of the item. Package includes: 1 Piece Wall Mounted Thermometer(without battery)