The DX-4 US Standard is a high-quality and efficient battery charger designed for the UltraFire 18650 2-SLOT LI-ION BATTERY. This product is specifically designed for indoor use and comes with a US plug for easy and convenient charging. With an input of AC110V-240V50/60Hz 200mA and an output of DC4.2V-650mACAUTION, this charger is capable of providing a quick and reliable charge for your batteries.Weighing only 54g, the DX-4 US Standard is lightweight and portable, making it perfect for on-the-go use. It features a 2-slot design, allowing you to charge two batteries simultaneously. The charger also comes with a light indicator, making it easy to monitor the charging process.Please note that this product does not include batteries and is not suitable for use with other types of batteries. It is important to follow common sense precautions, such as not throwing the charger into fire or placing it near high temperatures. The package includes 1 18650 double charger, making it a complete and convenient charging solution for your UltraFire batteries. Upgrade your charging experience with the DX-4 US Standard from UltraFire.