Isolation Barrier Unit, Color Gray, Enclosure Rating NEMA 1, Material Plastic, Mounting Location Surface, Overall Depth 7 1/2 in, Overall Height 9 3/8 in, Overall Width 13 1/8 in, Resistance Properties Not Applicable, Compatible with Manufacturer Model Number 262-001, 272-001, Features Analog, Isolation Barrier, For Use With Intrinsically-Safe Phones, Standards FCC, IC, UL/CSA