Features: 1. Support Infrared Control, Powerful Function 2. Supports Switching Between Self-Locking, Inching, And Modes, And Has Led Lights For Prompts. 3. Equipped With Cascade Port, Supports Ttl Serial Port For Re-Programming 4. With Infrared Remote Control 5. Low Signal Transmission Delay, Low Power Consumption, Stable Performance And Other Advantages Product Name: Infrared Remote Control Two-Way Relay Module Note: Different Batches May Have Differences In Product Appearance, Color, And Printed Characters, Which Will Not Affect The Use Module Size: About 56 x 33mm Material: PCB+ABS colour: As shown Package Contents: 1 x Infrared Relay Module 1 x Infrared Remote Control Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.