Germany
868 MHz two-way radio, in a category that mostly uses whatever is cheapest
Goliath appears three times, and the technical argument is the same in two of them.
The 868 MHz band is reserved in Europe for short-range devices with limited transmit time, so a sensor at the far end of a house is not competing with every router and doorbell in the street, and it travels further through masonry than 2.4 GHz.
Two-way is the more important half. The hub and each sensor confirm one another, so a sensor with a dead battery, a removed sensor or a jammed radio is reported rather than assumed. One-way systems treat silence as normal — which is precisely the state an intruder is trying to produce.
The starter set includes a motion detector that photographs what triggered it. Every alarm eventually raises the same question — was that a person or the cat — and this answers it without driving home.
It is also a camera inside a room, taking pictures when the system decides. Choose the room deliberately.
The two-wire AV-BLS-07A reuses an existing bell cable in most houses, and comes with two monitors. On a two-story house the second panel is what makes an intercom used rather than run downstairs for.
None of the three is listed on Amazon US: they are sold on the European Amazon stores. The 868 MHz band is a European allocation, not one that US alarm equipment is built around, so the alarm set and the siren belong to a European installation.
None of the three is listed on Amazon US: they are sold on the European Amazon stores. The 868 MHz band is a European allocation, not one that US alarm equipment is built around, so the alarm set and the siren belong to a European installation.
2-wire bus · two 7-inch touch monitors · surface-mounted outdoor unit · 2 MP sensor · expandable
A two-wire bus system with two indoor monitors, designed to reuse an existing bell cable rather than needing new conductors. Goliath states a 2 MP sensor, capacitive touchscreens and expansion with further indoor or outdoor stations.
Best for: A house with an existing two-core bell cable and two floors that both need a panel.
868 MHz two-way radio · motion camera with snapshot · contact · app and cloud
Goliath uses 868 MHz two-way radio rather than Wi-Fi for its sensors, and includes a motion detector with a camera that takes a snapshot when triggered.
Best for: A house where false alarms need to be verifiable rather than guessed at.
85–110 dB · 868 MHz AirShield, to 1,200 m (4 ft) open field · warning light · burglary, fire and panic tones
The outdoor siren for Goliath's AirShield system: 85 to 110 dB with a warning light, three distinct alarm tones, and 868 MHz radio quoted at up to 1,200 m (4 ft) in open field.
Best for: A Goliath system on a property large enough that the hub and the siren are far apart.
