Data field from 0 to 8 bytes DC5V power supply module and SPI interface protocol control 120 ohm termination resistors, impedance matching, drive capacity, long distance data transmission against signal radiation. Module dimensions - 4 x 2.8 cm / 1.57 x 1.1 "(approximately). Working current - typ. 5mA & 1μA standby current. Working temperature - (industrial quality) -40 - + 85
