LED Football Referee Substitution Board, Football Match Equipment, Injury Time Display Electronic Boards Change Player Soccer, 60cm Waterproof, Built-in Battery

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. We have 3 standard sizes, 60/70/82cm to choose from, with high safety performance and light weight Suitable for indoor, semi-outdoor and outdoor use; pure aluminum frame structure, can work normally in rainy days, but not in water