Uniden DECT 2085-4WX Cordless Phone System with 4 Handsets (1 Waterproof) and Digital Answering System Digital Answering System with Handset Access Plus DWX207 Submersible Waterproof Accessory Handset - JIS7 Compliant, Impact and Dust Resistance Intercom or Call Transfer between Handsets & Base 3-Way Conference Calling - Allows you to conference Line 1, Line 2, base and caller for 3-way conferencing.