任意主机可对指定从机发送数据，只有被指定的从机能收到并输出数据，其它从机无输出。

中继技术就是在节点与节点之间增加一个或多个中继节点，负责对无线信号的一次或多次转发；

同等功率情况下，窄带传输是普通带宽通讯距离的两倍以上

Transmitting in broadcasting way: The data sent by any module can be received by modules of the same address and channel. Transmitting in fixed transmission way: The data sent by any module can be received by specified modules of the different addresses and channels. If multiple receiving modules have the same address and channel, they all can receive the data at the same time.

Battery powered

任意模块发送数据，具有相同地址且相同信道的模块均可同时接收数据。