Compatible With: Fanvil X4SG, X4U, X5U, X6U IP phones, Material: ABS, Dimension: 169 x 131 x 47mm, Weight: 88.9g, Colour: Black. Fanvil WB101&WB102 is a wall bracket accessory package when the IP phone needs to be wall-mounted. It is suitable for a variety of Fanvil IP phones, which is easy to install and save space.