1. Power on: Before powering on, pressing the button has no response. Upon inserting the USB, the LED alternates between red and green flashing. 2. Normal startup: Pressing and holding the button for 3 seconds results in the green LED flashing three times, indicating normal startup. If there's a startup delay, the device flashes red and green alternately every or when the button is pressed. 3. Temperature monitoring: During monitoring, if the temperature exceeds the alarm threshold, the red LED flashes once every or when the button is pressed. If the temperature is normal, the green LED flashes once every or when the button is pressed. 4. Data recording: Recording stops only when there are two or more data entries. 5. Stopping recording: and hold the button for 3 seconds, the red LED flashes three times, indicating the device has stopped recording. Alternatively, the device can be plugged directly into a computer's USB port to stop recording. 6. Shutdown without report reading: If the device is shut down using the button without reading the report, pressing the button lightly causes the red and green LEDs to flash once. 7.Initial connection to computer: When first connected to a computer, the green LED remains on until the report generation is completed, after which it turns off, and the red LED starts flashing. At this point, the computer detect a USB drive containing reports in PDF/CSV format. 8. Report reading: After reading the report, pressing the button lightly causes the red and green LEDs to flash twice. Specifications: 1. LED indicators: Red, Green 2. Button: Power on/off, control 3. Data storage: Requires a minimum of two data entries to stop recording 4. Connectivity: USB interface for power and data fer Colour:Green+White Material:plastic Package Contents: 1 * Temperature Data Logger 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.