The CELL-ANTHB is an Honeywell AlarmNet GSM high-gain indoor antenna designed to boast cellular network coverage of Honeywell security systems. The cellular antenna kit includes an antenna with a hepta-band blade and a CELL-EXT coax cable adapter. The CELL-ANTHB antenna supports all freqency bands for LTE, 4G, 3G, and CDMA in North America and is compatible with all cellular communicators used with VISTA and LYNX PLUS controls. Keep in mind, this antenna is for indoor use only.