Controlled LED Busy Sign (Case Dimension: 12x30 cm) Case 12x30cm There is an LED inside that indicates whether the sign is lit or not. It is designed for interior use. You can switch between busy/available messages using the remote control. It works with RF ID. It is hung with a hanging device. If you have a special design, we can help. Our products are our own production and are guaranteed against manufacturing defects for 2 years.