Red Velvet members released their official concert lightstick. This piece of a merchandise is in the shape of a cupcake and has two letters 'RV' Inside. It can work in several modes - it can be constantly on, blink or flicker.
It is powered by three AAA batteries. It can operate for a maximum time of 5 hours. It weights around 1.5 lbs. You can connect the lightstick to your smartphone via Bluetooth.
It is certified by SM Entertainment - the agency of Red Velvet.