AD22A08 DC 12V 8 CANALES DTMF Relé Teléfono Señal de Voz Decodificador Control Remoto
Model: AD22A08. The majority of smartphones and functions machine are DTMF code. Eight modes of operation, electric iron jumper (picture above) on the pads. Self-locking: Dial 1, relay 1 "Open", dial 1 again, relay 1 "off", and so on.