What is MHL? MHL stands for Mobile High-Definition Link. It allows you to connect your MHL enabled device to a TV, projector, PC or other HDMI device. This Fosmon quality MHL adapter can support up to 1080p HD video and digital audio while simultaneously providing power to your Samsung Galaxy S3. You will be able to watch movies, home videos and pictures, or listen to music from your smartphone or tablet right on your home theater system. The adapter easily connects to the USB 2.0 Micro-B port of a MHL enabled device. Use your HDMI cable to connect the MHL to HDMI adapter to an HDTV or an HDMI home theater system. The MHL adapter features an USB Micro-B (female) power input. Connect the charger supplied with your mobile device to the MHL adapter to power your mobile device while it is in use.