Fangrui Product Details 1 Product Model: Ad22b04 2. Working Voltage Dc 12v, With Reverse Polarity Protection 3. Operating Current: Standby 11-13 Ma, 1 Relay On 44ma, 2 Relay On 77ma, 3 Relay On 110ma, 4 Relay On 140ma 4 Eight Working Modes: Non-locking (instantaneous), Self-locking (triggering), Interlocking (latching), 5/20/60/120/250 Seconds Delay 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 Default Control Command Is 1/2 / The Control Command Can Be Changed To Any 1-4 Bits. (for More Details, Please Refer To Ad22b04_4 Channel Dtmf Controller Command Setting Manual). 6. Maximum Load: 10a/250vac, 10a/125vac, 10a/30vdc, 10a/28vdc, 10a/12vdc Typical Product Applications: Home Lighting System Dtmf Remote Control Switch Smart Home/home Automation Dc 12v Led Lighting Fluorescent Lamp 12v Dc Motor Fluorescent Lamp Automotive Electronics Industrial Automation And Control Note: Due To Different Production Batches, There May Be Slight Differences In Products.