[Communication Interface]：UART serial port
[Transmit Power]：30 dBm
[Communication Range]：5 km
[Size]：26.5*33 mm
[Introduction]：The EWM201-470A30S is a new long-range wireless audio transmission module from Chengdu Ebyte, featuring an integrated transceiver design. It offers flexible configuration, ease of use, and a compact form factor. Operating in the 470MHz–510MHz frequency band, the module allows users to configure parameters—such as transmit power, operating channel, and serial baud rate—via commands to suit specific application needs. Supporting microphone input and speaker output, the module operates in point-to-point or point-to-multipoint half-duplex or full-duplex modes; a complete full-duplex intercom system can be assembled simply by connecting an external microphone, audio power amplifier, speaker, antenna, and power supply.
Official Store| RF parameters | Parameter value | Remark |
| Operating frequency band | 470MHz～510MHz | Configurable frequency band |
| air speed | Full-duplex: ≤29.8kbps | - |
| Half-duplex: ≤14.9kbps | ||
| Receiver sensitivity | Full-duplex: -121dBm | Full-duplex: 29.8kbps |
| Half-duplex: -124dBm | Half-duplex: 14.9kbps | |
| Modulation method | DPFSK | Modulation technology |
| Transmit power | ≤30dBm | Software adjustable |
| Emission current | ≤1A | At maximum power |
| RF interface | IPEX/Stamp Hole | Equivalent impedance approximately 50Ω |
| Main parameters | performance | Remark | |||
| Minimum value | Typical value | Maximum value | |||
| Operating voltage (V) | 2.4 | 3.7 | 5.5 | Output power can be guaranteed with a voltage of ≥3.7V; there is a risk of burnout if the voltage exceeds 5.5V. | |
| Operating temperature (°C) | -40 | - | 85 | Industrial-grade design | |
| Operating humidity (%) | 10 | - | 90 | - | |
| Power consumption | Emitting current (mA) | 365 | 680 | 910 | Instantaneous power consumption |
| Received current (mA) | 28 | 31 | 32 | ||
| project | Specification |
| Encoding Algorithm | OPUS |
| Speech coding rate | 10kbps |
| audio sampling rate | 8kHz , 16 -bit |
| Audio input | 0~708mV |
| Audio output | 14mW/ differential output 32Ω load |
| Intercom mode | Half-duplex / Full-duplex |
| Hardware parameters | Parameter value | Remark |
| Packaging method | patch | - |
| Interface method | stamp perforation | Spacing 2.00mm |
| Communication interface | UART serial port | Supports AT commands |
| External dimensions | 33*26.5 mm | - |
| Product net weight | - | - |