Q label: Tested longevity and reduction of false alarms. Different alarms for fire and heat alarms. Increased stability, e.g. B. against external influences. Heat detection by maximum and differential function. Permanently installed battery with a service life of at least 10 years. Muted alarm signal (approx. 75 dB (A)) during function test. KRIWAN recognition. Integrated function key for e.g. B. alarm acknowledgment, function test and muting. VdS approval applied for. Switchable smoke detection. Automatic smoke evaluation self-test with pollution tracking. Contamination or fault display.  Signaling delayed by up to 12 hours in the event of a technical fault in the dark. Low battery indicator. Networking of up to 40 smoke alarm devices possible. One module interface for three optional modules (KNX module, radio module, relay module) with simultaneous use of the network terminal.   Case: Ø 125mm Height 48mm   Suitable accessory for smoke alarm device Dual/VdS °Radio module for smoke alarm device Dual/VdS (mute) 2341 00 °Relay module for smoke alarm device Dual/VdS 2340 00 °230 V base for smoke alarm device Dual/VdS 2331 02 °Set spacers / screws 234202   Increased quality criteria and technical developments in smoke alarm devices are represented by the new Q mark on the market. The new Q-Label is an independent and manufacturer-neutral quality mark for high-quality smoke alarm devices that have been specially tested for long-term use. The latest generation of Gira smoke alarm devices meet the criteria of the new Q-Label quality mark. The smoke alarm devices work according to the photoelectric scattered light principle without radioactive preparations. The smoke alarm devices detect smoke development in good time and warn before the smoke concentration can become dangerous for people. The alarm is triggered by a loud, pulsing alarm tone and a flashing LED.   Installation instructions according to § 13 NAV   Please note that devices with a connection value of 230V are supplied with a protective contact plug or a permanent connection (without plug), depending on the power value. If the device has a permanent connection, a specialist company should be commissioned with the installation.   All devices with a connection value of 400V or more must be operated via a suitable high-voltage connection and may only be connected by an electrician.   Devices with a rated power of more than 12KW require the approval of your network operator. To do this, please contact the network operator or an installation company entered in the network operator's installer directory prior to installation. Such an installation company will help you to obtain the necessary approval from the respective network operator.