RJ11/RJ12 6P6C 4-Way Buss Breakout Board.

Vertical 6P6C jacks.
Pitch 5mm/0.197" screw terminal block.
Solder connection holes, four (4) per line, supports addition of 0.1" pin headers.
FR-4 fiber glass PCB, dual copper layers.
PCB dimensions: 72.5 x 47.35 x 16mm(W x L x H).
100% new, never used.

Rated voltage: 100V.
Rated current: 0.5A / per pin.
Operating Temperature: -20ºC to 50ºC

Terminal block specifications:
Wire range: 26 ~ 16AWG.
Strip length: 5mm.
Screws: M2, steel, Cr3+ Zn plated.
Pin header and Cage: Brass.