The handsets larger form factor supports a powerful radio that is better capable of penetrating walls and obstacles. The handsets offers 4 programmable buttons with lights, 9 fixed feature buttons and a 2-line display. The battery offers6 hours talk time and 4 days standby, a second battery can be simultaneously charge in the cradle. A 2.5mm headset jack is provided (appropriate for use with cell phone type headsets). Up to 3 3107C NBX cordless phones and their associated base stations may be deployed in the same work area. This product includes local power supplies for the base station and the charging cradle.The base station must be powered locally, it does not support Power over Ethernet.Package also includes 1 battery, 1 belt clip and a wall mounting bracket for the base station. Requires Group 1 device license(3C10411), sold separately.