Product Information:
Product category: red light green light blue purple light
Function: Anti-blue glasses test pen, outdoor teaching, directing, etc.
Material: metal
Color: Red light single point 5mw, blue-violet light single point 5mw, green light single point 5mw, red light green light blue-violet light (a set of three), USB charging type red light single point [built-in battery], USB charging type green light Single point [built-in battery], USB rechargeable blue and purple light single point [built-in battery]