Features: This LM317 adjustable voltages regulator module offer a wide input voltages ranges from 4.2V to 40V &adjustable output voltages from 1.2V to 37V, ensuring stable power for sensitive electronics Featuring a compact design for easy integration, excellent heat dissipation to maintain stability under high loads for simple wiring. Perfect for electronics hobbyists, enthusiasts, beginners, this adjustable power supply module provides straightforward setup with external resistors for precise voltages control in various projects. Ideal for applications, industrial equipment, powering voltages sensitive devices like sensors or microcontrollers, this step down bucking converter module adapts reliably to diverse operational environments. This voltages regulator module delivers consistent performances and longevity, making it for enhancing electronic systems reliability. Specifications: Component: PCB, metal Size:Approx.35x17x20mm/1.38x0.67x0.79inch Option Type:2pcs,4pcs; Input voltages : DC4.2V~40V Output voltages: DC1.2V~37V Current output: 1.5A frequency: 100MHz Input: VIN input positive poles, GND input negatives poles Output: VOUT output positive poles, GND output negatives poles Package Includes: Package A 2pcs Power Module Package B 4pcs Power Module note: Please allow 1-3cm errors due to manual measurement. Due to the differences between different monitors, the picture may not reflect the actual item color.