Description :

• DTMF Shield is a Dual-tone multi-frequency signaling module decoder for Arduino that can decode the sounds made by phones when keys are pressed
• Can be used to send wireless commands over audio lines, like a phone call
• Can be paired with GSM/GPS shield to enable communication with any phone landline or cell phone in the world, within GSM signal range
• Convenient for sending commands to your Arduino via audio signal
• Can be used with GSM/GPS shield to enable GPS geo-location mapping and DTMF moving functions for a GSM wireless networking remote controlled robot
• Audio socket and speaker connector for audio sound checking
• Microphone connector for over-the-air remote control system (note: not recommended due to environmental noise)
• Size: 37x37x9mm