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Features:
Product model: AD22B04.
Working voltage DC 12V, with reverse polarity .
Operating Current: Standby 11-13 MA, 1 relay "open" 44MA, 2 relays "Open" 77MA, 3 relays "Open" 110MA, 4 relays"open" 140MA.
Eight modes of operation: Non-locking (Momentary ), self-locking (Toggle), inter-locking(), 5/20/60/120/250-second delay.
The default control command is 1/2/3/4. Example: Dial 1 to control relay 1, dial 2 to control relay 2, dial 3 to control relay 3, dial 4 to control relay 4; control commands can be changed any 1-4 bits. (For more details, refer to "AD22B04_4 channel DTMF controller commands setting manual ").

Specifications:
Size: as the picture
Weight: 72g
Maximum load: 10A/250VAC ,10A/125VAC,10A /30VDC, 10A /28VDC ,10A /12VDC

Package Included:
1 x 4 Channel DTMF Tone Decoder Relay
1 x cable