... with LED writing board 4.SGS report new marker pen for led ad board -- Water-based, dry-wipe prescription-- Easy ... with wiper, tissue paper, etc.-- High Brightness neon color, best for indication on Mirror / Plastic board / Light board / Glass etc.-- ... ( Blue / Yellow / Green / Purple / Red / White / Pink / Orange)-- 4 models for choosing: ZD410,ZD510,ZD520,ZD610How to use1.activate-shake with ...