[Frequency]：425~450.5MHz
[Power]：20dBm
[Distance]：1.5km
[Interface]：UART
[Introduction]：E64-433T20S is applicable for star network with low power consumption. The biggest feature is to support at most 31 slaves send data to master at the same time and WOR mode for slaves(the average current is below 30uA). Data reliability and accuracy are guaranteed by strict data parity and automatic retransmission mechanism between master and slave.
| RF Parameter | Value | Remark |
| Working frequency | 425~450.5 MHz | Default: 433MHz |
| Transmitting power | 10~20 dBm | Default: 20dBm（About 100mW） |
| Receiving sensitivity | -121 dBm | Air data rate: 8kbps |
| Air data rate | 2k~20kbps | Default: 8kbps |
| Test distance | 1500m | In open and clear air, with maximum power, 5dBi antenna gain, height of 2m, air data rate: 8kbps |
| Hardware Parameter | Value | Remark |
Size | 17 * 30 mm | |
Antenna type | IPEX/external/spring | |
Communication interface | UART | Baud rate: 1200~115200, default: 9600 |
Package | SMD | |
Buffer | 512 bytes buffer | Automatically sub-packaging with 55 bytes per package |
| Electronic parameter | Min. | Typ. | Max. | Unit | Condition |
| Power supply | 2.3 | 5.0 | 5.2 | V | |
| Communication level | 2.5 | 3.3 | 3.6 | V | |
| Transmitting current | 82 | 89 | 98 | mA | 20dBm（100mW） |
| Receiving current | 15 | 16 | 18 | mA | |
| Sleep current | 3 | 4 | 5 | μA | |
| Operating temperature | -40 | 20 | +85 | ℃ | |
| Operating humidity | 10 | 60 | 90 | % | |
| Storage temperature | -40 | 20 | +125 | ℃ |