Features:Thisis the DTMF audio controller with four channels, any phone or fixed telephonewith DTMF key code remotely controls product relay open and close.The majority of smartphones and functions machine are DTMFcode. Workingvoltage DC 12V,with reverse polarity protection.Standby 11-13 MA, 1 relay open 44MA, 2 relays Open 77MA, 3 relays Open 110MA, 4 relays open140MA, 5 relays open 170MA, 6relays open 197MA, 7 relays open 223MA, 8 relays open 247MA.Eight modes of operation, Non-locking(Momentary ),self-locking (Toggle),inter-locking(Latch), 5/20/60/120/250-second delay.The default control command is 1/2/3/4/5/6/7/8. Example: Dial 1 to control relay1, dial 2 to control relay 2, dial 3 to control relay 3, dial 4 to controlrelay 4; control commands can be changed any 1-4 bits.Specifications:Model: AD22A08Working Voltage: DC 12VSize: Approx. 94 x 62 x 18mm/3.7 x 2.44 x 0.7inMaximum Load: 10A/250VAC, 10A/125VAC, 10A/30VDC, 10A/28VDC, 10A/12VDCInstructions:You need two phones, one as areceiver (phone_1), the other one as a transmitter (phone_2); mobile phone_1connected by DTMF audio cable 3.5MM audio controller (the controller to bepowered), and then using phone_2 ( may be a fixed telephone) call the phone_1, phone_1answered, so that two phone call each other; then dial 1/2/3/4/5/6/7/8 by phone_2keypad to control 8 relays .Caution:1.DTMF audio controller must use stable work of DC 12V power supply(recommendations 2A or above the power adapter)2. Remote control the controller by a mobile phone, the receiver must be thephone with 3.5MM audio interface, the transmitter can be a cell phone orlandline3. As a receiver of the phone must output a sound (not muted), or they will not control relays.Glossary:NO:Normal openCOM:Common terminalNC:Normal ConnectRelayopen: COM connected NO but disconnected NCRelayclose: COM disconnected NO but NC connected COM.Non-locking(Momentary ): Dial 1 (2/3/4 is the same),relay 1 "Open", relay close after 1 second delaySelf-locking: Dial 1, relay 1 "Open", dial 1 again, relay 1"off", and so onInter-lock: Dial 1, relay 1 "Open", other relays "Off";dial 2, relay 2 "Open", other relays "off", and so on"Delay": Dial 1, relay 1 "Open", relay 1 "Close"after a timeMode selection:Eight modes of operation, electric ironjumper (picture above) on the padsWiring diagram:1Control 12V circuit, the wiring as shown below. Load "LOAD" can beLED lights, fans, motors, routers, and other 12V equipments2DC 1-110V or AC 85-265V circuit, the wiring is shown below. Load"LOAD" can be LED lights, fans, motors, and other kinds of voltage ACand DC equipments.Package Includes:1 x Relay Module1 x 3.5mm Audio Cable.