Visonic GSD-441 Natural gas detector (methane). Siren 85dB

Natural gas detector (methane). Siren 85dB. Requires CR123A battery included.

• Ideal for protecting doors, windows and glass walls.
• Coverage curtain selectable between 2, 4 and 6 m (6, 12, 18 ft) to optimize performance based on wall size.
• Bi-directional FHSS-TDMA Frequency Hopping Spread Spectrum technology provides programmed systems with one. robustness and reliability more precise than ever.
• Long range transmissions that allow installations without a repeater.
• Battery with a life of 7 years in normal use.
• Visible indication of connection quality displayed on the device, this reduces installation time.
• Low battery indication visible and transmitted.
• Compatible with PowerMaster systems and PowerG receivers.
• Long battery life, 5 to 8 years (with normal use, depending on the type of battery).
• Emits sound and transmits alerts (for smoke, tampering, low