Multiple device charging: This car charger features 30 ports and a dedicated 84 ft DC output cable, enabling you to charge smartphones, tablets, dashcams, and more simultaneously. Fast charging technology: Equipped with QC and PD charging protocols, it optimizes charging speeds with a 5W port that delivers up to 1W of power for efficient device charging. Realtime voltage monitoring: The builtin digital voltmeter displays your vehicle's battery voltage in real time, helping you monitor battery health and charging performance. Wide vehicle compatibility: Designed for use in both 12V and 24V vehicles, this charger is for cars, trucks, RVs, and other vehicles with an extended 84 ft DC cable for flexible placement. Use scenario: On long family road trips, power multiple devices at once (phones, tablets, dashcams) without swapping adapters, while the 84 ft cable allows placement for convenient access. Use scenario: In a fleet or service vehicle, keep essential devices charged and monitor battery status to ensure readiness for daily operations. Use scenario: In an RV or camper, manage power for entertainment devices and navigation while maintaining battery health during extended trips.