LED Football Referee Substitution Board

Widely used in football matches to remind substitute athletes or injury stoppage time. Built-in safety polymer lithium battery; rechargeable; need to be fully charged in 3 hours and work for more than 3 hours; according to the normal frequency, a full charge can be used for more ...Widely used in football matches to remind substitute athletes or injury stoppage time. Built-in safety polymer lithium battery; rechargeable; need to be fully charged in 3 hours and work for more than 3 hours; according to the normal frequency, a full charge can be used for more than 12 times in a football game It can be red and green when used outdoors, with high brightness.

It can be seen directly in the sun.