Do I need a phone card to send messages by scrolling the LED display part of the light box?

How to transmit the content displayed by LED is determined by the LED display control card. Generally speaking, there are four transmission modes:

Wired transmission. In this mode, it is necessary to connect the light box and the computer with a cable, edit the content on the computer and then transmit it to the display control card/module of the light box.

USB flash drive transmission. This transmission mode also needs the help of a computer to edit the content, then save it in the USB flash drive, and then plug the USB flash drive into the display control card; The control card will automatically read the contents of the USB flash drive.

wireless transmission. In this mode, the content is also edited by the computer and then sent to the control card through the wireless network, and the card receives the content through the Wifi network.

SMS transmission. In this mode, you can use your mobile phone to edit content and then send SMS to the control card.