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WIRELESS DOORBELL TWIST ST-918. Radio transmission (frequency 433.92MHz). Encoding: 256 codes (code is set industrially, no possibility of code changes). Bell powered by 3 R6 batteries. Button powered by 12V battery. Operating range*: 80m in open environment. Button not suitable for operation in variable atmospheric conditions. 15 melodies to choose from (polyphonic ringtones).
*Translated using automatic translation tool