Backlight : LED Backlight clearly display screen information in weak light conditions . And a Plastic film on screen , protect led screen !Multi-function : Stopwatch mode , time mode , countdown mode , and alarm .Split recall memory : 2 lap memory to 39 hours and recall .Alarm & Keep silent : It's to turn off volume and alarm clock .Stopwatch is sed for sports and football matches , suitable for coaches , training , runners , adults and kids .focus on items , quality is soul , all of products will give you the stop watch .Stopwatch Instruction TIPS :1 . How to turn on / off alarm ?-- Press the "M" button switch "Clock" mode to "Alarrm clock" mode , then press "S" button , it will turn on or turn off alarm.2 . How many modes are there on this item ?-- Four modes : Clock , stopwatch , countdown , alarm clock.Plastic film : useing stopwatch , the plastic film can be taken out .Or still put it on the screen , It doesn't make too much visual interference.colour:SilverMaterial:metalsize:74*60*15MMPackage Contents:1*Stopwatch with battery