1、The baud rate 2400 4800 19200 BPS can be selected through the jumper, and the default baud rate is 9600 BPS.2、AT commands can be input by serial port super terminal serial port assistant, this product can support up to 64 devices in parallel.3、Convenient to use and with good performance, with small size, easy to carry and store.4、There are open, close, jog, self‑lock, interlock, and delay 6 working modes.5、Can be used with peace of mind, with strict quality control and quality assurance. Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Sold by-Minnanxin