E49-900M20S

[IC]：CMT2300A

[Frequency]：850~930MHz

[Power]：20dBm

[Distance]：3km

[Size]：20*14mm

[Feature]：Low power

E01-2G4M27SX

[IC]：nRF24L01P

[Frequency]：2.4~2.525GHz

[Power]：27dBm

[Distance]：4km

[Size]：18*14.5mm

[Weight]：1.0±0.1g

[Feature]：2.4GHz SMD wireless module with ultra-small size

E28-2G4M12S

[IC]: SX1280

[Frequency]: 2.4~2.5GHz

[Power]: 12.5dBm

[Distance]: 3.0km

[Size]: 24*15mm

[Weight]: 1.6±0.1g

[Feature]: LoRa spread spectrum,FLRC