General description The AD22B04 4 Channel Relay DTMF Tone Signal Decoder Remote Control Module is designed for use in smart home applications and industrial automation. It operates on a DC 12V power supply and features reverse polarity protection. This module allows for remote control of various devices through DTMF (Dual-Tone Multi-Frequency) signals, making it ideal for controlling LED lighting, fluorescent lamps, DC motors, and automotive electronics. Technical specifications Product model: AD22B04 Working voltage: DC 12V Operating current: standby 11-13 mA; 1 relay "on" 44 mA; 2 relays "on" 77 mA; 3 relays "on" 110 mA; 4 relays "on" 140 mA Maximum load: 10A/250VAC, 10A/125VAC, 10A/30VDC, 10A/28VDC, 10A/12VDC Eight working modes: non-locking (instantaneous), self-locking (triggering), interlocking (latching), with delays of 5/20/60/120/250 seconds Compatibility and accessories Includes 1 x AD22B04 DC 12V 4-channel DTMF decoder relay board Includes audio cable Usage This module can