Model No. HG-1500 Auto dialer version -dial-in control of arm, disarm, listen-in and event report. -operation mode selectable A) completely dial 4 calls each 10 rings for 3 times B) one of 4 calls once been answered and stop dialing next. -4 segments of voice recording defined for basic information, burglary, fire, medical messages. -play total 30 seconds with 2 messages combined together. - timing counting indicated when recording. Specifications Frequency:303mhz,315mhz,433mhz Power source: AC adapter, DC 12v Power consumption:60ma (idle),300ma (activated). Back-up battery (optional accessory): Approx.7 hrs. Rf range:150 feet in open air space Security code: Hopping code, over 16 million combinations Resonator: Saw (surface acoustic wave) resonator Dialing type: Pulse/tone selectable LCD display:63 sensors and operation manual indication. Help button: One touch for panic emergency Alarm activation:10 - 255 seconds Voice recording: Total 30 seconds Preset telephone numbers:6 numbers, max.20 digits for each number Password: Max.6 digits Dimensions:7 x 10-1/4 x 1-5/8 (26 x 17 x 6 cm) HG-1500 System Package Including: HG-1500 One Piece Main Console c/w AC/DC adapter HG-120 One Piece Passive Intrared Motion Detector HG-123 One Piece Door/Window Magnetic Contact: DC9V SR-119 One Piece 4-Button Remote Controller HO-102 One Piece Mini Piezo Strobe Siren, Red Color. Optional HG-120 Passive Infrared Motion Detector HG-122 Door/Window Magnetic Contract; DC12V HG-123 Door/Window Magnetic Contract; DC9V HG-125 Gas Detector HG-126 Range Extender HG-118 Smoke Detector SR-117 Watch Type Emergency Button SR-119 4-Button Remote Controller