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 time up 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 high quality items , quality is our soul , all of products will give you the high quality 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 once , 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 :Before 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:Silver Material:metal size:74*60*15MM Package Contents: 1*Stopwatch with battery 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.