Tollan holographic device
From The Stargate Omnipedia
Small Tollan device which fits into the palm of the hand. It serves as a portable holographic image display, capable of playing back a three-dimensional personal recording.
The device may also be capable of making three-dimensional recordings.
KEY EPISODE
Between Two Fires - Narim delivers a message to Carter and SG-1 through a Tollan holographic recording device, explaining that Omac believed Earth is in grave danger.