What card is used for GSM control card?

As the name implies, GSM is a short message, and the GSM control card board needs to be equipped with a SIM card to use.

GSM control card is a control system that is sent to LED electronic screen through sms channel control information of mobile phone.

Advantages: where there is no network, you can edit short messages through your mobile phone and wirelessly transmit information to the LED display screen.

Disadvantages: the number of words is limited, and the content can only be edited by mobile phone, and the typesetting is not as convenient as GPRS wireless remote control card on pc.