Illuminated (only when connecting to bell transformer) as well as non-illuminated bell push-buttons may be used.

• 2 different designs in one tool
• smoked glass look / silver
• continuous volume control from 0 (Off) up to 95 dB(A) (extra loud)
• H x W x D approx. 190 x 160 x 45 mm
• 20 melodies with hold-to-run control adjustable
• double call differentiation (e.g. for side entrance)
• connection:
  bell transformer 8 V 1 or 2 A or
  bell transformer 8 V 1 or 2 A and batteries (4 x 1,5 V LR14/Baby) or
  only with batteries (4 x 1,5 V LR14/Baby) (not included in delivery)