This item is in used condition but is still functional.  Item works via BlueTooth with android or iPhone if you have the app, bit it is no longer on the store. Items work well, but has some wear from its use, as pictured. 

Please see pictures for information.  Item charges direct from usb cord to the transmitter.  There is also an Amazon app available to give you more precise data information for every 30 seconds during the night.  Please check this out on your own. 

Box has some wear, but the product works.