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The Wi-Fyre Wireless A2S Heat Detector consists of a ProFyre fixed heat detector head combined with the Wi-Fyre wireless base. The fixed heat detector uses a single thermistor arrangement that gives an alarm at a temperature of 90°C.

- Operating Frequency: 868 - 870 MHz, 14dBm
- Range: 150 m open area
- Power Source: 4 x Lithium AA Cell (Saft LS14500)
- Battery Life: Up to 3 years
- Dimensions (Diameter x Height): 103 x 71mm
- Weight (Including Batteries): 330g
- Housing Material: Polycarbonate
- Colour: White
- Tamper: Detector and/or base removal
- Applicable Standards: EN54-25, BS 5839 Part 1:2002, ENTSI 300:220