From The Stargate Omnipedia
Ancient remote
Handheld electronic device. The remote is the only portable interface for a
kino, and can control video recording toggle as well as the device's movement.
The remote also functions as a portable dial-home device. If on a mission with an away team, the remote keeps an accurate countdown of time before the Destiny departs from the Stargate network.
Since there are no dial-home devices paired with Destiny-type Stargates, an Ancient remote is the only solution for dialing home. If a member of the team leaves with the only remote, the remaining team members are stranded unless another remote is sent back from the ship.
KEY EPISODES
Air, Part 2 - Eli Wallace discovers the bay where kinos are kept, as well as the remotes which guide them.
Air, Part 3 - A remote is sent with the away team to a desert world so that they may return home, but is almost lost when Franklin attempts to flee to another planet with the device.