Main features: | Very long operation time, Operation temp : -40 °C ... 60 °C, Weighs 1/3 less than standard alkaline batteries, Holds power for up to 20 years of shelf life, Leak-proof construction | Relay output - The possibility to send an impulse to another device if the alarm presence is exceeded, for instance: ventilator, siren, solenoid valve The 12V DC power output, allowing for example to shut-off the gas valve |