Features: Elevate your control systems with the AD22B04 Channel DTMF Tone Signal Decoder Relay, offering multifunctional command capabilities for sophisticated automation. Boasting a robust design on a PCB with plastic components, this relay module operates at 12V for reliable performance and features customizable remote commands for high adaptability. Ideal for electronics enthusiasts and technical engineers, the AD22B04 is tailored to professional requiring precise remote operation of devices or systems. Perfect for home automation systems, industrial remote control applications, and laboratory equipment management, this module thrives in complex control environments. Eight working modes: jog, self-locking, interlocking, 5/20/60/120/250 second delay The default control command is 1/2/3/4. For 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; the control command can be changed to any 1-4 digits Digital (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/250V AC, 10A/125V AC, 10A/30V DC, 10A/28V DC, 10A/12V DC 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. Package includes: 1pc 4 Channel DTMF Tone Signal Decoder Relay 1pc 3.5mm Cable Achieve precise 180 degree adjustable angled control with SG90 servos driver board, for customizing servos rotation ranges in robotics and automation projects. Featuring two analog/digital signals compatibility, this control module ensures stable performances while saving space in intricate setups. for robotics enthusiasts, educators, and hobbyists creating robots, automateds systems, or STEM learning tool requiring servos motion customization. Integrate seamlessly into robotic arms, automateds displays, or educational kits where servos management and heat dissipating durability for prolonged operations. Engineered with enhanceds thermals management, this servos driver board maintains temperatures during heavy duty tasks, ensuring longevitys for SG90 baseds servos control applications.