1. Power off/pause button/return to the main interface. Long press for 2 seconds to power off/on. During the power on process, short press to pause the real-time data. Short press again to continue the real-time data.Short press this button in any interface except the main interface to return to the main interface function (pause or real-time icon reminder) 2. Page button Short press to cycle through three function interfaces Real-time Greaterthan Maximum value plusAverage value plusTotal Greaterthan Bar graph (with interface navigation bar)When switching to the other two interfaces, it will stay for a long time unless you switch back or short press 1 to return to the main interface 3. Mute/vibration button/screen off Short press to cycle through reminder modes: sound reminder only-vibration reminder only-sound vibration reminder-sound vibration reminder-sound vibration reminder-sound vibration reminder-off reminder This button is only valid in interface 1 and interface 2, This button has no function in other interfaces (since other pages do not display sound and vibration reminder icons, other interfaces do not have the function set by this button)Long press to turn off the screen, short press any button during the screen off process to light up the screen 4. Set alarm value Short press to enter the alarm value setting: short press once for maximum value alarm, short press again for total amount alarm. Long press in these two interfaces to enter the setting, the alarm value flashes during setting, 5. Short press the page key to select the alarm value. Short press again to save and exit. In the 4 interfaces, if there is no operation within 5 seconds or the 1 key is pressed shortly, the current settings will be saved and exit to the main interface. This button has no function in other interfaces (since other pages do not display sound and vibration reminder icons, other interfaces do not have the function set by this button) Long press to turn off the screen, short press any button during the screen off process to light up the screen Colour:Grey Material:aluminum alloy Tips: The product may be updated constantly ,Due To Different Batches, The Actual Product May Have Slight Differences Or Color Differences, Which Does Not Affect Use Package Contents: 1 * detector 1 * cable 1 * English manual 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.