I bought this for use with a Motorola v551 cell phone. This was a good deal because at the time the product description said it included the Mobile PhoneTools Software - it does NOT. The CD is for the WIDCOMM bluetooth driver only.Rebate: Even though this says there is a $20.00 rebate the UPC on the box is not on the rebate form! So I don't know yet whether or not there is one. If there is not, this is not worth $49.00. I will return it and just get a generic adapter or buy the package that REALLY has the Mobile PhoneTools Software in it.Note: If you want to use this with Windows XP Pro SP2 be aware that the installation guide that says in BIG RED print how to install is wrong - at least for SP2. Here's the deal. Their proceedure works up until the point Microsoft included a signed bluetooth driver in SP2. At that point the signed driver will always be picked over the unsigned WIDCOMM driver. Easy to get around, ONCE YOU KNOW. Just let MS install their driver, then go to Device Manager, select the bluetooth device and update driver. Don't do any searches but instead just point to the WIDCOMM driver.Next Issue: When you finally get Mobile PhoneTools Software, either start at v1.23 then download the 2.16 (US) Upgrade and then use LiveUpdate to get to 3.19e. The 3.11 version does not appear to support LiveUpdate AND has a problem interacting (in that it doesn't) with OutLook 2003.All said and done, I like the cute little adapter. It is a Motorola so, as others have mentioned, compatibility with Motorola phones should not be an issue. I really feel like marking this down lower just due to the very poor software installation documentation and problems - but what the heck, they're no worse than the rest of the pathetic industry.