A Portal Beam is supplied with 3M double-sided mounting tape, mounting screws and anchors, and pre-installed batteries. Its features are located on the side of the Portal Beam.
Optional accessories (sold separately): suspended ceiling mount kit, AC power supply.
On the side of the Portal Beam you'll find:
Reset Button: resets the device.
Power switch: turns battery power on/off.
DC socket: AC power adapter input.
These features are covered by the device casing and are not visible to users.