The Remote Loop is an accessory for the Siri Remote, Apple’s remote for the Apple TV 4K and Apple TV HD. When the Apple TV HD (Generation 4) was released with support for games, the Siri Remote included motion sensors for use in some games.
As the Nintendo Wii demonstrated, TV screen safety became an issue when the controller’s motion sensors require swinging a remote at the TV. Apple created the Remote Loop to keep you TV screen safe. According to Apple:
“The Remote Loop keeps your Siri Remote safely tethered to your wrist so you won’t have to worry about accidental slips or drops. It clicks into the Lightning connector on the remote for secure attachment and easy removal. And you can adjust the size for a snug and secure fit. The Remote Loop is compatible with the Siri Remote for Apple TV 4K and Apple TV HD.”
The Remote Loop sold separately and was similar to the iPod touch Loop. However, the Remote Loop uses a connector similar to a Lightning port, but with retracting spikes on both sides. The spikes serve to securely attach the loop to the remote and are released by squeezing the buttons on both sides. A similar connection method was used in early 30-pin Apple connectors that shipped with iPod and early iPhone devices.
The Remote Loop measures 8.68 inches long, 0.36 inch wide, and 0.22 inch deep. It weighs 0.1 ounce. The Remote Loop was only available in black.
Sources: Apple (Siri Remote, Remote Loop), 9to5mac