5V output power supply for charging Phone, MP3, MP4 devices Approx 30000 hours of fault service life for long term reliability DCDC conversion module: accepts input from 9V, 12V, 24V or 36V and provides a stable 5V DC output for vehicle charging, with a 3A current limit and voltage stabilization Benefits: simple integration with vehicle electrical systems, reliable 5V charging for USB devices, protection from voltage fluctuations, low maintenance Compatible scenarios: suitable for cars, Vans, trucks and other vehicles with 936V systems; ideal for charging standard USB devices on the move Use scenarios: 1) Daily commuting or road trips to charge Phone, MP3 and MP4 players from the vehicle power supply 2) In larger vehicles or fleets to power multiple USB devices from higher voltage sources with stable 5V output 3) Mobile work setups in vans or trailers requiring a dependable 5V supply for USB powered equipment Performance and reliability: designed to deliver a stable 5V output under varied vehicle voltages, with a robust operating life and minimal maintenance requirements Notes: maintains 5V DC output suitable for USB charging applications and ensures compatibility with devices that rely on standard 5V USB power