Usage Tips:ADSL MICROFILTER SUITABLE FOR PHONES, FAX MACHINES , ALARM SYSTEMS AND DIGITAL TV BOXES. The DSL filter adaptor separates voice and data signals to prevent interference and dropouts. This splitter is designed for use with ADSL broadband internet in the UK FEATURING HIGH-PERFORMANCE CIRCUITS TO KEEP TELEPHONE CONVERSATIONS at high quality while maintaining ADSL line speeds. It plugs into a BT-style telephone socket and provides one telephone socket as well as one ADSL modem connector socket. THE CIRCUIT PROTECTION BE PROVIDED MOSTLY BY STANDARD CENTRAL PROTECTION means and additional protection measures built into the POTS splitter to protect against line overload, which could harm the splitter itself. BT TO RJ11 ENABLES A BROADBAND MODEM TO PLUG IN ALONGSIDE A NORMAL TELEPHONE DEVICE. It filters out undesirable noise that might otherwise appear on the telephone side due to the ADSL signal. WE ARE TRYING TO PROVIDE YOU WITH THE BEST - the ADSL microfilter was radically redesigned in order to its durability, stability, and accuracy of fit. Colour:White Material:plastic Package Contents: 2 * BT Plug to ADSL RJ11 Splitter Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.