About the transmitter module (square shape):
- Compatible with Arduino
- Arduino Library: VirtualWire
- Working voltage: 3-12VDC
- Working current: 3.5mA
- Working frequency: 433MHz
- Transfer rate: 4.8kbps (max)
- Transmission distance: When the spring antennas are soldered to transmitter and receiver module and the power supply is 5V, the open area transmission distance can be increased to 40 meters. The supply voltage is larger, the transmission distance farther.
- Antenna: You can use the wire whose length is 17cm or the spring antenna for 433MHz RF.