Specification: _x005f_x000D_ Origin: Mainland China _x005f_x000D_ Product weight: 20g _x005f_x000D_ Product size: About 52.8x32x18mm/2.07x1.25x0.71 _x005f_x000D_ Coil voltage: 5V/12V _x005f_x000D_ Instructions for use: _x005f_x000D_ 1. Connect the corresponding direct power supply according to the voltage version _x005f_x000D_ 2. According to the requirements of the wiring diagram, the power supply cannot be connected in reverse. Although there is a protective circuit, it cannot be connected in reverse for a long time _x005f_x000D_ 3. The product uses a voltage regulator (5V without a voltage regulator) to generate slight heat, which is a normal phenomenon. Long term operation of the relay also results in normal heating, which is a normal phenomenon _x005f_x000D_ _x005f_x000D_ _x005f_x000D_ Note: _x005f_x000D_ Due to the different monitor and light effect, the actual color of the item might be slightly different from the color showed on the pictures. Thank you! _x005f_x000D_ Please allow 1-2cm measuring deviation due to manual measurement. _x005f_x000D_ _x005f_x000D_ _x005f_x000D_ _x005f_x000D_ Included: _x005f_x000D_ 1 x Relay Module 1. Versatile Usage: The relay module can be used to control various household appliances, lighting fixtures, and factory equipment, making it a valuable tool for a range of small-current high-voltage products. 2. Reliable Performance: This module utilizes a double-sided PCB design, single-chip microcomputer control, and an anti-interference capability that makes it significantly more reliable than CD4013. 3. Powerful and Stable: With its large-power voltage regulator and sufficient heat dissipation holes, this module can work stably and reliably for long periods. 4. Safe and Protective: Equipped with a reverse power supply protection diode, this product can withstand short-term reverse power without damage.