Features: There are 8 kings of baud rate to choose from. The model can work in any channel from the 16 channels,different equipment in different channel can work properly without interruption. In the peer-to-peer mode, the DL-20 module uses the negotiating multiple access control protocol to send and receive simultaneously in both directions. In the broadcast mode, data input to one module on the serial port will be converted to wireless data. All modules in the nearby channels that receive the same data will receive this data and send the data out of their serial port. Transmission with acknowledgment mechanism to achieve 0 packet loss rate. Specification: Chip: CC2530F256RHAR Working frequency: 2400 - 2450MHZ Transmitting power: 4.5dBm Transmission rate: up to 3300 Bps Transmission distance: measured 250 meters Wide voltage range: 3V - 5.5V Operating current: less than 30mA Support working mode: point-to-point working mode, broadcast working mode Communication interface: UART serial data Baud rate: 2400 4800 9600 14400 19200 38400 57600 115200 Working Channel: 16 channel divisions in accordance with IEEE 802.15.4 protocol Receiver sensitivity: -97dBm Point-to-point bit error rate: 0% Broadcast bit error rate: 0.5% Antenna Interface: Built-in PCB Antenna Size: 15.5*31.5mm (Excluding pinout) Packet length: support serial transmission, unlimited length Package List: 1*DL-20 Model with Pin 1、There are 8 kings of baud rate to choose from. 2、The model can work in any channel from the 16 channels,different equipment in different channel can work properly without interruption. 3、In the peer-to-peer mode, the DL-20 module uses the negotiating multiple access control protocol to send and receive simultaneously in both directions. 4、In the broadcast mode, data input to one module on the serial port will be converted to wireless data. All modules in the nearby channels that receive the same data will receive this data and send the data out of their serial port. 5、Transmission with acknowledgment mechanism to achieve 0 packet loss rate.