[. . . ] Thank you for selecting the SupraPlusTM Wireless C351N DECTTM Headset System from Plantronics. the C351N offers wireless , hands-free headset convenience and workspace mobility. Your C351N is compatible with DECTTM telephone systems that support the GAP Standard. [. . . ] Hereby declares that this C351N DECTTM Wireless Headset System is in compliance with the essential requirements and other relevant provisions of Directive 1999/5/EC. A copy of the Declaration of Conformity to the essential requirements of 1999/5/EC maybe found at www. The C351N complies with the EU recommendations on human exposure to electromagnetic fields. Desk Charger Module To use your Plantronics C351N DECTTM Headset System, please follow these simple steps: 1. The headset must be charged for a minimum of 1 hour prior to use ­ 3 hours to fully charge. Prior to using your C351N headset for the first time, you MUST register(1) it with your DECTTM telephone. Before attempting to register the C351N headset, first read the instructions for registering a new DECTTM handset in the manual supplied with your DECTTM telephone. The process for registering the C351N headset will be very similar and the information below describes the registration sequence for a typical DECTTM telephone. Change the system Authentication code of your DECTTM telephone to 0000 to match the preset PIN of the C351N headset. Note: Many DECTTM telephones already use 0000 as their default Authentication code, so you may not need to change it. Place the DECTTM telephone base in subscription mode by following the instructions in your DECTTM telephone manual. Do not follow the DECTTM telephone manual instructions to place the handset in registration mode as this will register the handset rather than the headset. Complete registration by following any remaining instructions in your DECTTM telephone manual. Important: Your DECTTM telephone system must comply with the Generic Access Protocol (GAP) standard to work with the C351N headset. Modern DECTTM systems comply with the GAP specification, but some older systems may not. If in doubt, check the documentation supplied with your DECTTM telephone. [. . . ] Once battery is removed, gently disconnect battery connector; do not pull hard. Before replacing battery into compartment, please be sure battery wires are on side closest to opened battery door; the battery cannot be installed properly if wires are on other side. Using the "Y" end of the tool, press the battery backwards and away from battery door until the left corner of the battery tucks under the post in the battery compartment. [. . . ]