PTB series of table boxes is designed to provide elegant solutions for almost any A/V integration application. Available in 2, 3, and 4 gang sizes. PTB table boxes handle data, power, and AV connections in a pneumatically powered pop up design. PTB's superior integral manual latching mechanism does not require AC or DC power to operate, simply push down on the cover of the box to raise or lower the unit in the table. FSR's pneumatic gas spring system allows for smooth lowering and raising of the box for a high tech look and feel. PTB's are available with either black or brass covers. The UL rated PTB boxes have 2 grounded AC receptacles on each side of the box. These do not take away any space from the plate openings. The AC receptacles are also isolated from the plate openings to alleviate interference with the audio, video, or data signals.