Particularly developed for caravaning or boat range. Acoustic alarm (85dB). Fits into installation frame (see plug /plug sockets within range of electrical connection) respectively Truma installation frame. Ready for use after approx. 60 seconds. Acoustic signal disconnectible. It is recommended to let it install by trade company. Voltage 12V DC: temperature -10°C +40°C: functionality with humidity 30 -95%: acoustic signal by alarm approx. 85 dB (1m distance by using an external add on hooter). Sensitivity 300 ppm, if gas detection continues longer than 3 minutes.