Includes digital alphanumeric receiver with 2 zonesSmall transmitter 2 trigger zones plus manual page Installer-tunable transmitter for max. range Alphanumeric display of car/zone break-ins Transmitter: Monitors up to 2 zones per premises or vehicle, plus manual paging. Manual paging button included. Connect to nearly any type of burglar alarm control panel, vehicle alarm, communications panel, etc. Miniature size. Easily concealed anywhere inside car or customer premises. Positive and negative, instant triggers. Installer may adjust for maximum range with the X-PDC2 field strength meter. Range up to 1 mile, depending on environment, installation, and/or antenna. Add a siren, and becomes a complete alarm. Over 1 million possible coding combinations. Connect to a CB antenna, car AM radio antenna (cable included), or strip antenna. Automatic power antenna control. Immunity circuit to eliminate false alarms. Belt-clip receiver (model E-35RD, included) Code learning receiver learns up to 3 transmitters. Alphanumeric display indicates which zone (1, 2, or manual) of which premises or vehicle (A, b, or C) was triggered. EEPROM stores codes up to 1 year without power. Stores the last 6 pages for easy recall. Unattended page indicator. Low battery indicator (2 AAA batteries not included).