GTN 3139 Our doorbell transformers are specially designed for use with doorbells, doorbells, chimes and door openers in residential areas, where they are active for short periods of time. In contrast, safety transformers are designed for continuous and permanent operation. Grothe's bell and safety transformers are equipped with a PTC (Positive Temperature Coefficient), which protects the transformer on the primary side in the event of short circuits or overloads. If the PTC is triggered due to an overload or short circuit, the transformer is temporarily de-energised for at least 1 minute so that it can then be put back into operation. All our transformers fulfil the strictest environmental protection requirements and have been tested and certified in accordance with EN61558. Note: A higher output voltage occurs at low load or no-load operation! After a short circuit, recommissioning takes place by briefly disconnecting the primary side from the mains. (At least 1 minute)(Exception: GT 50810) Accessories AP mounting set: Includes two cover caps to achieve protection class IP20 and mounting rails and material for surface mounting, art. No. 14936

Our battery-operated doorbell impresses with its simple installation and a variety of useful functions. The doorbell is triggered by a cable connection with an integrated terminal block. This doorbell offers three different adjustable sounds and an impressive maximum volume of up to 83 dB(A) to ensure you don't miss any important notifications. With the 3-fold call differentiation, you have the option of distinguishing between different doorbells, as it is possible to switch to other CROMA doorbells or to electromechanical doorbells. Another advantage of this doorbell is the minimal standby loss, which significantly extends the battery life. Under normal operating conditions, the battery life is around 3 years, which ensures long-lasting and reliable use.

Our battery-operated doorbell impresses with ist simple installation and a variety of useful functions. The doorbell is triggered by a cable connection with an integrated terminal block. This doorbell offers three different adjustable sounds and an impressive maximum volume of up to 83 dB(A) to ensure you don't miss any important notifications. With the 3-fold call differentiation, you have the option of distinguishing between different doorbells, as it is possible to switch to other CROMA doorbells or to electromechanical doorbells. Another advantage of this doorbell is the minimal standby loss, which significantly extends the battery life. Under normal operating conditions, the battery life is around 3 years, which ensures long-lasting and reliable use.

With 17 appealing polyphonic melodies, you can choose your favourite sound. It is also possible to switch between melody and an alarm tone, depending on your individual requirements. The doorbell offers two trigger modes that can be set for both channels together: continuous operation and one-time operation. The volume is adjustable and can be increased to an impressive 86 dB(A). The 2-fold call differentiation makes it possible to distinguish between different events or alarms. For added ease of use, the signalling device has a SILENCE function that enables simple one-button muting. Despite its powerful functions, this signalling device has minimal standby loss, which significantly extends battery life. An acoustic signal is emitted when the battery is low. Under normal operating conditions, the battery life is around 3 years, which ensures long-lasting and reliable use. Our signalling device is the optimal choice for flexible and effective acoustic notifications. Note: Safe call tone activation with potential-free contact or with 8 - 12 V~/= Can also be used for mixed installations and for renovations (e.g. 8V power supply of an existing bell transformer and triggering with potential-free contact) Parallel connection to other CROMA doorbells or electromechanical doorbells possible

With 17 appealing polyphonic melodies, you can choose your favourite sound. It is also possible to switch between melody and an alarm tone, depending on your individual requirements. The doorbell offers two trigger modes that can be set for both channels together: continuous operation and one-time operation. The volume is adjustable and can be increased to an impressive 86 dB(A). The 2-fold call differentiation makes it possible to distinguish between different events or alarms. For added ease of use, the signalling device has a SILENCE function that enables simple one-button muting. Despite its powerful functions, this signalling device has minimal standby loss, which significantly extends battery life. An acoustic signal is emitted when the battery is low. Under normal operating conditions, the battery life is around 3 years, which ensures long-lasting and reliable use. Our signalling device is the optimal choice for flexible and effective acoustic notifications. Note: Safe call tone activation with potential-free contact or with 8 - 12 V~/= Can also be used for mixed installations and for renovations (e.g. 8V power supply of an existing bell transformer and triggering with potential-free contact) Parallel connection to other CROMA doorbells or electromechanical doorbells possible

ECHO 120, black The special thing about the ECHO 120 is that it has a brilliant hi-fi sound and can be customised with your own melodies using an SD card. Using the software included in the scope of delivery, you can edit your personalised ringtones and transfer them to the SD card. Thanks to the extremely powerful LED flash light, the ECHO is also ideal for people with hearing problems, making it an excellent companion for senior citizens. Another useful feature of the ECHO is the so-called "LOW battery" indicator, which signals that the battery is almost empty so that you won't be surprised by an empty doorbell. But our doorbell can do more than just be loud! If you want to have some peace and quiet, you can easily mute the doorbell using the mute function, which is also visually indicated by the doorbell. Note: Ring tones can have a maximum duration of 90 seconds. The doorbell is designed for wall mounting. Batteries not included in the scope of delivery! Do not clean the high-gloss surface with a microfibre cloth. Do not use cleaning agents and only wipe with a damp cloth.

ECHO 120, white The special thing about the ECHO 120 is that it has a brilliant hi-fi sound and can be customised with your own melodies using an SD card. Using the software included in the scope of delivery, you can edit your personalised ringtones and transfer them to the SD card. Thanks to the extremely powerful LED flash light, the ECHO is also ideal for people with hearing problems, making it an excellent companion for senior citizens. Another useful feature of the ECHO is the so-called "LOW battery" indicator, which signals that the battery is almost empty so that you won't be surprised by an empty doorbell. But our doorbell can do more than just be loud! If you want to have some peace and quiet, you can easily mute the doorbell using the mute function, which is also visually indicated by the doorbell. Note: Ring tones can have a maximum duration of 90 seconds. The doorbell is designed for wall mounting. Batteries not included in the scope of delivery! Do not clean the high-gloss surface with a microfibre cloth. Do not use cleaning agents and only wipe with a damp cloth.

Our classic electromechanical Grothe dual-tone doorbell offers a sound experience of the highest quality. Equipped with sound plates made of real bell steel, this doorbell produces a clear and rich tone that is not only easy to hear, but also offers a pleasant sound quality. The tried and tested conventional technology ensures maximum durability and reliability. The housing is finished in a timeless white and has a high-gloss black front, which gives the doorbell an attractive appearance. You have the choice of operating the doorbell with either an external transformer or a 9 V block battery (type 6LR61), which gives you more installation freedom. Note: Only install in dry rooms! Recommended transformer when using the external power supply: GT 3148, item no. 14201 Additionally with compartment for 9 V block battery (type 6LR61) Battery not included in the scope of delivery