You can use this 433MHz transmitter module with either individual push-buttons or microcontrollers like Arduino.
Arduino connections:
Technical specifications:
- Model no: TB416 Encoder Transmitter
- Operating voltage: 9VDC
- Operating current: >100mA
- Operating frequency: 433MHz
- Modulation: ASK/OOK
- SAW frequency stability: ±150kHz(max)
- RF output power: >55mW
- Data rate: ≤10Kbps
- Antenna lenght: 18 cm (433.92 MHz)
- Dimensions: 49x31x8mm
- Modulation: SC2262, compatible with PT2272 IC
- Range: ~4km (open field)