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The doorbell is easy to install and has a working range of up to 80 m. The ST-918 set is powered by 4 R6 batteries, and its radio transmission is 433.92 MHz.
The ringtone level is 80dB and there are 15 polyphonic melodies to choose from.
Both the button and the bell have an IP20 degree of protection and are not adapted to work in changing weather conditions.
Moreover, the kit contains 256 codes that are factory set and cannot be changed by the user.
The nominal voltage of the device is 4.5 V DC and the button is 12 V DC.
Bell and push button housings are made of high-quality plastic in white and blue.