Description Function 1. 3 Sets of Alarm：Can be used for different needs When Alarm ring，press any key to stop alarm If no press any key,alarm will stop after 1 minute 2.Screen display in 2 Modes when USB Powered Screen Always On：Time state---Press “Down” key ---Switch to “--Sd" Power Saving Mode:Time State---Press"Down" key--- Switch to “oNSd"---Screen will be off after 5-10s---Press any key---Screen will be on for 5-10s 3.Night Mode Night mode is on by default and cannot be turned off Screen will be dimmed from 19:00-6:00 everyday 4.12/24H Hold “SET” key more than 3s---12Hr/24Hr flash---Press "UP"/"DOWN" adjust to 12/24H 5.Date Display Time state---Press "SET" key---Date flash---Hold "SET" more than 3s---Month flash---Press "UP"/"DOWN" to adjust month---Press "SET" key---Day flash--Press "UP"/"DOWN" to adjust day 6.Three Display Mode DP1:Time display for 10s---Date display for 2s---Temperature display for 2s-Cyclic display DP2:（1）Press "SET" switch to Time--- Always displayed in Time （2）Press "SET" switch to Date--- Always displayed in Date （3）Press "SET" switch to Temperature--- Always displayed in Temperature DP3:Time display---Press "SET" key switch to Date/Temperature---No operation for 15s---Back to time display 7.Power-off Memory Function CR2032 Battery（Not Included）only for Power-off Memory Function It cannot be Powered by CR2032 Battery （Not Included） Product Show Words:White/Red/Green/Blue Material of Screen:Mirror Size: 7*4*1.9cm/2.76*1.57*0.75inch Battery is Not Included.You need to buy a button battery for storage time, otherwise the time will return to zero after the power is cut off. And there have three notes: 1. If the screen of the product you received is scratched, please remove the protective film. 2. If your screen suddenly goes off, please check if you have set "oN Sd" This mode is a power saving mode, it will automatically go off and automatically light up. Please set back to "-- Sd" mode, this mode will always show on the LED 3. If you receive the product and the USB cable and ADAPTOR still don’t work, please check whether it is 5V. If It has any other question,please contact me as soon as possible, instead of opening disputes and leaving bad comments. We will do our best to solve the problem