I purchased this recently and the seller told me that it needed a new battery. I found out that the company who makes the app to make this useful has dropped distribution and support for the use of this monitor.  I don't know if you already have the app will this device work. I have not found another provider of the app to make this useful for me. This device is being sold as is with your complete understanding of the issues behind the ability to use this device as it was intended. Ask any questions prior to purchase. I ship out items within 2 days of purchase and I post feedback to an ebay buyer's profile once the item has been delivered and the buyer is satisfied with the transaction. Thanks for looking.