Do not buy
Will not work indoors.  Works outdoors, however does not give gps location so if you cannot speak, it is rendered worthless,  Called the helpline and was told it works on GSM technology.  That is not the current US. standard.  GSM is an informal name for 2g.  I have a 2g cell phone and it wont work indoors either.  att dropped 2g all together and so have many other companies.
Rating: 1 stars