1 card required for every 3 caller ID compatible CO lines installed
Maximum of 2 additional cards per system (3 total)

Technical Details

Product Details

Product Dimensions

Package Dimensions
Width : 4.8 inch
Height : 1.3 inch
Length : 5.5 inch

Item Weight: 0 ounce (View shipping rates and policies)
Shipping Weight: 0 ounce (View shipping rates and policies)

ASIN : B000BNZG5A