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, 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 reminder) 2. Page button Short press to cycle through three function interfaces Real-time Maximum value + Average value + Total Bar graph (with interface navigation bar)When switching to the other two interfaces, it stay for a long time unless you switch back or short press 1 to return 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 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,, Manufacturer: Akfldms