Features:
Product model: AD22B04.
Workingvoltage DC 12V, with reverse polarity protection.
OperatingCurrent: Standby 11-13 MA, 1 relay open 44MA, 2 relaysOpen 77MA, 3 relays Open 110MA, 4 relaysopen140MA.
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. Example: Dial 1 to control relay 1, dial2 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_4channel 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