Retractable Micro USB Plug in Car Charger with Extra USB Charging Port for MetroPCS Samsung Galaxy S7 (SM-G930T) - MetroPCS ZTE Obsidian - MetroPCS ZTE ZMax - Sprint HTC Desire 626s Smart IC chip technology included to avoid overcharging. LED indicator. Extra Charging USB Port to charge a second phone. High performance, compact device. Convenient compact size with tangle-free wire to use with ease. Rapid retract button located on top to retract charging cable. LED charging indication, smart IC chip recognizes a fully charged battery and automatically switches to a saver mode. Standard Cigarette Lighter plug fits most automobiles, RVs, boats. - Allows usage of phone while charging.