Features:_x000D_ _x000D_ Support ASCII text and RTU dual protocol automatic identification, no user setting in required. _x000D_ The meter can display 4 digit of serial port. _x000D_ Wide range of power supply voltage between DC7~36V. _x000D_ Large 0.56inch display area for only 4 digit ,more clear. _x000D_ The baud rate can be 1200bps/2400bps/4800bps/9600bps/19200bps/38400bps/57600bps/119200bps. _x000D_ _x000D_ Specification:_x000D_ Display Digit:4_x000D_ Display Size:0.56inch_x000D_ Display Color:Red_x000D_ Power Supply Voltage:DC 7~36V_x000D_ Current:30mA_x000D_ Wiring Diagram:_x000D_ V+ :Power positive_x000D_ GND: Negative power supply_x000D_ A: RS485 BUS A_x000D_ B: RS485 BUS B (note the wiring sequence, first connect the power cable to confirm the module works normally and then connect the communication line)_x000D_ Communication interface: non-isolated, 485 bus and GND terminal common ground. If there are multiple devices on the bus, be sure to connect the terminating resistor to the bus end device._x000D_ Baud Rate:_x000D_ 1200bps/2400bps/4800bps/9600bps/19200bps/38400bps/57600bps/119200bps_x000D_ Size:79 x 43 x 21.5mm / 3.11 x 1.69 x 0.85in _x000D_ Installation Size:76 x 39.2mm / 2.99 x 1.54in _x000D_ _x000D_ Package List:_x000D_ 1 x Meter