Fluorescent marker pens 1.environment protection, no harmful 2.8 ... writing board-- Water-based, dry-wipe prescription-- Fluorescent marker pens, Easy to wipe off with wiper, tissue paper, etc ... Plastic board / Light board / Glass etc.-- Fluorescent Marker Pens, Water-base without toxic, no harmful to skin-- 8 colors ... LED flashing in black environment!!! Fluorescent Marker Pens for LED Writing Board