THIS RECEIVER IS USED WHEN CHARGING YOUR DEVICE ON A WIRELESS CHARGING PAD. SIMPLY PLUG IT INTO YOUR PHONE AND PLACE IT IN BETWEEN YOUR PHONE AND CHARGING PAD. INSTANTLY, YOUR PHONE WILL BEGIN CHARGING! THIS RECEIVER HAS A CHARGING VOLTAGE OF 500-800MA AND WORKS FOR IPHONE MODELS 5- 6S PLUS! 3" L X 3" W X .75" H