Product Features and Technical Details Product Features REGULAR PRICE $24.99 Excelsius Z-BlockerDual DSL filter model Z-D250P2J2-port, one side filtered for telcoone side unfiltered for ADSLComplies with Part 68, FCC RulesFCC Reg., #6HEUSA-33640-OT-NRinger Equivalence 0.1BREGULAR PRICE $24.99