Features: Elevates your control systems with the AD22B04 Channel DTMF Tone Signal Decoders Relays, offering multifunctional command capabilities for sophisticated automation. Boasting robusts design with plastic components, this relays module operates at 12V for reliability performances and features customizable remote commands for high adaptability. Suitable for electronics enthusiasts and technical engineers, the AD22B04 is tailored to professional requiring precise remote operate of devices or systems. Perfectly for home automation systems, industrial remotes control applications, and laboratory equipment management, this module thrives in complex control environment. Eight working modes: jog, self-locking, interlocking, 5/20/60/120/250 second delay The defaults control command is 1/2/3/4. For example: dialing 1 to control relays 1, dialing 2 to control relays 2, dialing 3 to control relays 3, dialing 4 to control relays 4; the control command can be changed to any 1-4Digital (see "AD22B04 4-channel DTMF Controller Command Setting Instructions" for details Specifications: Component:PCB+Plastic Size:Approx.80x50x19.5mm/3.14x1.96x0.76inch 12V Power Model:AD22B04 Maximum load: 10A/AC250V , 10A/AC125V, 10A/DC30V , 10A/DC28V, 10A/DC12V Package Includes: 1pc 4 Channel DTMF Tone Signal Decoders 1pc 3.5mm Cable note: Please allow 1mm errors due to manual measurement. Due to the differences between different monitors, the picture may not reflect the actual item color.