[IC]：CC2531
[Frequency]：2.394~2.507GHz
[Protocol]：Zigbee
[Distance]：200m
[Interface]：USB
[Introduction]：E18-2G4U04B uses CC2531 RF chip imported from Texas Instruments. The chip integrates 8051 microcomputer and wireless transceiver, and integrates PA + LNA, which greatly expands the communication distance and improves communication stability, and it is equipped with ADC sampling, remote PWM output control, remote GPIO control and other
| RF Parameter | Value | Remark |
| Frequency | 2394~2507 MHz | Support ISM band |
| Transmitting power | 4 dBm | - |
| Receiving sensitivity | -96.4 dBm | Air data rate: 250kbps |
| Communication protocal | ZigBee | - |
| Test distance | 200m | In open and clear air, with maximum power, 5dBi antenna gain, height of 2.5m, air data rate: 250kbps |
| Hardware Parameter | Value | Remark |
IC | CC2531F256RHAT/QFN40 | Built-in PA+LNA |
FLASH | 256 KB | - |
RAM | 8 KB | - |
Core | 8051 MCU | - |
Size | 59 * 18 mm | With housing |
Antenna type | PCB | - |
Powered by | USB | - |
| Electronic parameter | Min. | Typ. | Max. | Unit | Condition |
| Operating voltage | 2.7 | 5 | 5.5 | V | powered by USB |
| Operating voltage | 2.0 | 3.3 | 3.6 | V | powered by pcb power supply hole |
| Communication level | - | 3.3 | - | V | For 5V TTL, it may be at risk of burning down |
| Transmitting current | - | 31.5 | - | mA | Instant power consumption |
| Receiving current | - | 26 | - | mA | powered by USB |
| Sleep current | - | - | - | μA | - |
| Operating temperature | -40 | 20 | +85 | ℃ | - |
| Operating humidity | 10 | 60 | 90 | % | - |
| Storage temperature | -40 | 20 | +125 | ℃ | - |