This 4-channel DTMF relay board lets you control your props, lights and just about anything else with DTMF tones.

When ordering, choose between the following power supply options:

• No power supply- provide your own.
  
• Standard power supply- provides enough current to run the DTMF board only.
• High-Current power supply (2A)- use the same supply to power the board as well as external 12VDC devices like solenoids and motors.