Uniden DRX402A English Owner's Manual - Page 6

Using the MULTIRANGETM Charger How It Works The DRX402 MULTIRANGETM charger extends the range of your base in all directions, including up and down. Each handset will automatically connect to the charger or the base, depending on which signal is stronger. (The handset operates exactly the same way whether it's connected to the base or to the MULTIRANGETM charger.) Base Coverage Area Handsets in this area always connect to the base. Base CONFERENCE CALLER IDENTIFICATION Overlap Coverage Area Handsets in this area might connect to the base or the charger. MULTIRANGETM charger Extended Coverage Area Handsets in this area always connect to the charger.  To use the charger's MULTIRANGETM function, you must register the charger to a DECT4066, DECT4086, or DECT4096 base. (Any MULTIRANGETM chargers that came packaged with the base are already registered to that base for you.) 6