This is an upgraded infrared thermometer K3 Pro with many improved functions & designs and can work for a whole week with just 4 AA batteries. Features: 5 languages: Chinese,English,Korean,Spanish,Portuguese K3 Pro is an upgraded thermometer based on K3. Its automatic storage function enables you to review 30 sets of data without connecting it to a computer. In the use of the scene, it also has a great improvement since it not only can proceed with indoor temperature measurement, but also outdoor temperature measurement K3 Pro supports signal output of IO, switch and pulse. It can independently connect to some electronic equipments such as the entrance guard system, and it's measure speed has upgraded to 0.1 seconds to measure the temperature accurately. You can set different temperatures to make it send voice alarms based on the temperatures you set. It can be installed easily and meet different requirements at various occasion. Based on different using environment, just use a triangle bracket to hold it or hang it on the hook or install it with screws. Various charging methods: it can be charged by USB wire, power bank or AA batteries (4 sections). Specifications: Item Mode: K3 Pro (upgraded mode) Accuracy: ±0.2 degree(35~42℃，place it in the operating environment for 30 mins before use) Alarm Function: abnormal automatic alarm, flash + sound alsrm for about 10 seconds Measuring Distance: 5~10 cm automatic measurement Display: LCD display Transmission Interface: USB Type C Power Supply: 4 AA batteries ( external power supply and internal power suppluy can be switched) Install Method: Nail hook or bracket fixing Environment Temperature: 10 ~40 ℃( recommended 15 ~ 35 ℃) Measuring Range: 0~50 ℃ Response Time: 0.5s Counting Capacity: 9999 times Standby: 30s automatic standby during non-working hours Input: D/C 5V 500mA Languages: Chinese,English,Korean,Portuguese,Spanish. Package Weight: 475 g/ 16.8 oz Package Size: 185*165*135mm/ 7.3*6.5*5.3in Packing List： 1* Temperature gun