BST Elevator Auxiliary Intercom BH211-Z Speed governor Car wal: Honeycomb marble (Dick

Car wal: Honeycomb marble (Dick cream-colored) + hairline brown stainless steel inserted strip+ mirror stainless steel titanizing black

Options: With a keyhole

when the car over-speed or even risk to fall while other protection devices do not work

Size of the sensor: φ24*87mm

BST Elevator Auxiliary Intercom BH211-Z Speed governor Car wal: Honeycomb marble (DickInput voltage: 12V DC 24VDC 10% Standby current: 25mA Maximum audio current: 300mA Frequency: 300 4000Hz Ringtone level: 70dB Car phone volume: 70dB Call distance: 3500m Connecting wire: 0. 75mm Working temperature: 1055 Supports up to 199 office address codes Missed call storage callback function