Backlight : LED Backlight clearly display sn information in weak light conditions . And a Plastic film on sn , prot led sn !< />Multi-function : Stopwatch mode , time mode , countdown mode , and alarm .< />Split recall ry : 2 lap ry to 39 hours and recall .< />Alarm & Keep silent : It's to turn off volume and alarm clock .< />Stopwatch is sed for spor and football matches , suitable for coaches , training , runners , adul and kids .< />focus on high qua items , qua is our soul , all of produc will give you the high qua 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 sn , It doesn't make too much visual inteerence.< />colour:< />Material:metal< />size:74*60*15MM< />Package Conten:< />1*Stopwatch with battery