... RGB color led light source led message board4. 3*AA battery box, easy to change battery and portable5. ON ... , orange, green, pinkFrame materialABS plasticBoard materialMitsubish acrylic boardBattery box3pcs AA batteryPower cord1m USB power cordPower adapterInput: AC100-240V, Output: ... Method1. Open the battery box and put in 3pcs AA batteries, cover the battery box2. Write/draw anything you like ...