1、Built-in program, no need to pay attention to serial protocol automatic networking. 2、Support one to multiple interconnection and transparent transmission. 3、Operating frequency range (433.4-473.0MHz, up to 100 communication channels) Maximum 100mW transmit power. 4、The module supports one-to-one, one-to-many, many-to-one, many-to-many connections. Four transparent transmission modes to suit different applications. 5、Built-in MCU, free of programming, communication with external devices via serial port. <span style="font-size:16px;font-family:Arial;"><strong>Features:</strong></span> <ol> <li> <span style="font-size:16px;font-family:Arial;">Built-in program, no need to pay attention to serial protocol automatic networking.</span> </li> <li> <span style="font-size:16px;font-family:Arial;">Support one to multiple interconnection and transparent transmission.</span> </li> <li> <span style="font-size:16px;font-family:Arial;">The open environment transmission distance is 1KM.</span> </li> <li> <span style="font-size:16px;font-family:Arial;">Operating frequency range (433.4-473.0MHz, up to 100 communication channels) Maximum 100mW transmit power.</span> </li> <li> <span style="font-size:16px;font-family:Arial;">The module supports one-to-one, one-to-many, many-to-one, many-to-many connections. Four transparent transmission modes to suit different applications.</span> </li> <li> <span style="font-size:16px;font-family:Arial;">Built-in MCU, free of programming, communication with external devices via serial port.</span> </li> <li> <span style="font-size:16px;font-family:Arial;">Not limited to the number of bytes sent in a single transmission (FU1/FU3 mode).</span> </li> <li> <span style="font-size:16px;font-family:Arial;">Default factory setting: working mode FU3, baud rate 9600bps, communication channel CH001 (433.4M).</span> </li> </ol> <span style="font-size:16px;font-family:Arial;"><strong>Specification:</strong></span> <span style="font-size:16px;font-family:Arial;">Voltage:3.2~5.5V(If the module is to be in the transmitting state for a long time, it is recommended to connect a 1N4007 diode in series when the power supply voltage exceeds 4.5V to avoid the built-in LDO heating of the module.)</span> <span style="font-size:16px;font-family:Arial;">Distance:600m(The maximum communication distance can be adjusted to 1000m and the air baud rate is 5000bps)</span> <span style="font-size:16px;font-family:Arial;">Default Standby Current:16mA(</span><span style="font-size:16px;"><span style="color:#2E3033;">The working current of the module is different in different working modes</span>)</span> <span style="font-size:16px;font-family:Arial;">Size:27.8 * 14.4 * 4mm / 1.09 * 0.57 * 0.16in</span><span style="white-space:pre;"> </span> <span style="font-size:16px;font-family:Arial;">Working Frequency:433.4~473.0MHz</span> <span style="font-size:16px;font-family:Arial;">Maximum Transmission Wattage:100mW</span> <span style="font-size:16px;font-family:Arial;"><strong>Package List:</strong></span> <span style="font-size:16px;font-family:Arial;">1*Module</span> <span style="font-size:16px;font-family:Arial;">1*Spring Shaped Antenna</span> <span style="font-size:16px;font-family:Arial;"></span>