The transmitter for the Logitech headphones is a small block, approximately one inch square and two to three inches long--it's very small. ----- Original Message ----- From: "Linda Davis" <lindamay.davis@xxxxxxxxxxx> To: <bookport@xxxxxxxxxxxxx> Sent: Tuesday, November 28, 2006 10:10 PM Subject: [bookport] Re: bluetooth headphones Well, I just wasn't sure how big the transmitter would be as far as traveling.