Rj11 plug [NOT BT PLUG]4P4C to RJ11 2-Way Female Modular Phone Telephone Wall Splitter
4-Conductor 4P4C Phone Splitter Adapter with 1 plug and 2 jack.
Plug 2 voice or data devices into 1 jack.
RJ11 2-Way Splitter splits one jack into two jacks.
Supports one or two lines on each jack.
Plug the 2-for-1 Modular Splitter into existing modular jack at the wall.
You can then plug any combination of phones, answering dialers, modems, speaker phones, etc., into the two outlets.
Dimension: L3.7 x W2.7 x H 2.2cm
1 x 2-Way Telephone Adapter