The Seventeen official light stick was revealed on February 3, 2017. It was released a week later on February 10 at the Seventeen in Caratland fan meeting. The light stick has a white handle and a pink gem placed inside a transparent dome. It is called a Carat Bong after the name of their fan club Carat. This is an official item from Pledis Entertainment.
 
The light stick has a feature that allows it to be connected to your mobile device via Bluetooth. You can achieve this by downloading and installing a special Seventeen app. The app allows it to work in additional modes and enables many different color effects.
 
The light stick needs 3 AAA batteries to operate. It can work in three modes: on, blink and flicker and can produce the light of all colors.
 
The size of the item is 105 x 105 x 250 mm. In the package you will also get a white strap with a Seventeen logo on both sides and a user manual.