Do you want to just roll and unroll your background rolls too? With studioking's rc-4we wireless remote, you can do that without touching the reels. The rc-4we is specifically designed for the b-4we background system. One battery is required for the remote control and another is included as a spare battery. These are 23a 12v batteries. Application studioking remote control rc-4we for b-4we for the perfect connection with the background system you push out the antenna. Each row of numbers from left to right represents a role. Keys 1 and 2 are for roll 1, keys 3 and 4 are for roll 2, and so on. The remote control has 1 channel. As soon as you insert the batteries, the remote control is ready for use. It's that easy to roll and unroll your rolls. This article is not suitable for falcon eyes systems.