How to use: 1. Press and hold the "start/stop" button for more than 3s, the "OK" indicator will be on for 3s, indicating the device starts recording, and then you can place the device in the environment you need to control. 2. During the recording process, the device will automatically turn on the light 10s. If the normal light (green light) is on 10s, it means that the device does not overheat during the recording process. If the alarm indicator light (. red light) illuminates 10 seconds, explain that excessive temperature occurred during the recording process. Note: If overheating is detected during the recording process, the green light will no be illuminated. 3. Press and hold the start/stop button for more than 3s, the alarm indicator (. red light) will be on for 3s, indicating that the device will stop recording. Recording will also stop automatically when the device is full. After the device stops recording, it will not flash automatically. If the device overheats during recording, press the start/stop button. If the normal indicator (green light) is on, it means that the temperature is not overwritten during recording; If there is an alarm when the indicator light (. red light) is on, it means that the temperature is overheating while recording. Remove the waterproof packaging bag and insert the device into the computer's USB interface. During the process of creating PDF files, the normal indicator light (. green light) and the alarm indicator light (. red light) will turn on. When the file is generated, the normal light (. green light) will be on until the is removed from the computer. Widely used for monitoring food, medicine, products and other transportation and storage processes. After finishing the recording, you can directly insert the computer to the PDFreport. Built-in USB connector, directly connect to PC or mobile phone, no cable or reader needed. With 0.5C high precision and high sensitivity. It has a small and size, easy to carry. Wide of temperature measurement, it can 10,000 data. Condition: Item Type: Temperature Recorder Size: .67x28mm/2.64x1.1in (L x W) Weight: .13g/0.5oz Type: Single use Recording interval: 10 minutes Accuracy: 0.5(-20~+40) Range: 1 Data capacity: 10000 Alarm temperature range: Less than 2 or 8(Less than 35.6 or 46.4) Start delay: 30 minutes Working environment temperature: -30~+60 Reminder: Do not disassemble the package. testing Turn on the device, press the start button, and the light will be on for 10 seconds, indicating that the product is good, and it will start recording after 30 minutes of power on (do not press the stop button and do not connect the computer, press the stop button (do not press the stop button if you 't to record) and connect the computer, this product can no be used after one time. color:As shown Material:plastic Package Contents: 1 x Temperature Analyzer Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.