Brickhouse has released a new spy gadget, a 2-way micro headset that fits in your ear and is nearly invisible:
Finally released to the public, the Secret Service grade Invisible Headset is the ultimate communications tool for extreme covert communications operations. This is the smallest device of its kind. The micro-sized earbud is smaller than a hearing aid which fits snugly and securely in the ear canal. A small invisible thread allows safe removal after use. The wireless transmission is completely silent and automatically picked up by the micro-earbud from the transmission necklace. The invisible headset is the worlds smallest device anywhere without the need to take an impression of the ear canal.
You can get it on their site for $649.95. Hightech secret service gadgetry ain't cheap.