Features: The Double USB Port DCStep Down Module efficiently converts wide input voltages ranges of 9V to 36V into stable 5V output, making it ideal for powering USB devices like mobile phones and tablets with its Double USB port. Featuring a high efficiency of up to 92% and switching frequency of 150KHz, this module ensures minimal energy loss and extended battery lifes, while builts in overloads and short circuits protections safeguards your devices during operation. Design for tech enthusiasts and DIY hobbyists, this step down module is perfect for anyone look to power or charge multiple electronic devices simultaneously. Suitable for various applications, including car charging adapter, solar power systems, and portable powerbanks, this compactly module integrates seamlessly into diverse projects requiring reliable 5V power supply solution. With its professional design and easy installation, the module offers versatility and durability, ensuring long terms stability and performances in both stationary and mobile applications. Specifications: Component:Plastic Size:Approx.49.8x35.9mm/1.96x1.41inch Output: 5V/3A(Most) Input:6V-40V (DC5.5/2.1socket, terminals block) Efficiency: 92%(Most) Switching Frequency: 150KHz Working Temperature: -40℃~+85℃ Load Capacity: Most output 3A (two mobile phones at the same time) Application: USB 5V power supply equipment such as mobile power, mobile phone, tablet, Package Includes: Package A 1pc Step Down Module Package B 2pcs Step Down Module note: Please allow 1mm errors due to manual measurement. Due to the differences between different monitors, the picture may not reflect the actual item color.