Button optional:1.Elevator buzzer2.Braille: without braille3.Voltage: DC 24V4.Material :Frame in ABS ,surface in stainless steel .5.Life: more than 5 million of operation time6.Reference : all elevator
2.Braille: without braille
3.Voltage: DC 24V
4.Material :Frame in ABS ,surface in stainless steel .
5.Life: more than 5 million of operation time
6.Reference : all elevator