LED Display Automation Digital Delay Timer Control Relay Switch Module 3V/3.7V/4.5V/5V/6V Features: Low voltage for power supply, the lowest is 3V, convenient for use. Can be powered by 3.7V lithium battery, 5V power bank, switch power, transformer, etc. Adjustable delay time range: 0.1s to 999 minutes. The use of opto isolated input and output, enhanced anti-jamming capability and consumption. The setting parameters can be memorized after power off. To ensure stability, industrial grade PCB board. Applied to control motor, bulb, LED light string, mini pump, etc. Notice: Relay output is passive contact without charge output, and it control the on and off of the line. Working modes selection: after power on, long press K1 for 2s, later into the selection of modes: P1~4; K2 to enter the mode. P-1: A signal to trigger relay, time is up, the relay disconnect; P-2: A signal trigger and countdown begins, T1 seconds after, the relay closes T2 seconds, then opens; P-3: Connect T1 seconds, disconnect T2 seconds, infinite loop. Users can set the relay time T1 and T2; P-4: The relay closes when a signal triggers, when the trigger signal disappears, digital countdown begins, and the relay opens when the time is up. Specifications: Display: LED Digital Display Timing Range(Adjustable): 0.1s to 999 minutes Working Voltage: DC 3-7V(with mini jumper: 3-5.5V; without mini jumper: 3.8-7V) Signal Source: DC 3-12V Output Capacity: Can Control the Load within DC 30V 3A or AC 220V 3A Static Current: 15mA Working Current: 30mA Working Temperature: -40-85C PCB Size: 64 * 35 * 15mm / 2.52 * 1.4 * 0.in (L * W * H) PCB Weight: 20g / 0.72oz Package List: 1 * Delay Timer Module