The SC-6600 is a WiFi IP phone that allows simultaneous voice and data over a wireless network. It has a graphic LCD display and is designed for use in businesses, homes, or as a feature phone for IP PBX systems. Key features include SIP protocol support, wireless connectivity using 802.11b with a range of up to 300 meters indoors or 1000 feet outdoors, and voice call functions like conferencing, forwarding and more. It has a lithium battery providing over 3 hours of talk time and 21-23 hours of standby.