Uniden DRX402A English Owner's Manual - Page 8

 If you want to use the MULTIRANGETM charger with a different base, just register the charger to the new base. The charger automatically erases the link to the old base when it registers to the new one.  Only register the charger to one base at a time. If more than one base is in registration mode at the same time, you can't control which base the charger registers to. Placing the MULTIRANGETM charger Here are a few tips for placing your MULTIRANGETM charger so that you get the clearest signal and the maximum range:  Make sure you have good reception from the base.  Put the charger at least 35 feet away from the base or any other charger. (If you put the charger on a different floor from the base, don't forget to allow 35 feet vertically, also.)  If possible, mount the charger on the wall. Picking the best spot The best spot for the MULTIRANGETM charger is as far from the base as possible while still maintaining a good signal, or near the edge of the base's coverage area. To find the edge of the coverage area: 1. Stand near the base and make a call on the handset. 2. While on the call, carry the handset away from the base towards the general area where you want to put the charger. 8