This is an Telemecanique Photoelectric proximity sensor 12V-24 VDC. Its part number is  XUB2ANANL2R. This item comes as pictured and does not include any additional parts or accessories.

Specifications:

Manufacturer: Telemecanique

Part Number: XUB2ANANL2R

Range of Product: Telemecanique Photoelectric sensors XU

Electronic sensor type: Photo-electric sensor receiver

Sensor design: Cylindrical M18

Detection system: Thru beam

Material: Plastic

Line of sight type: Axial

Type of output signal: Discrete

Supply circuit type: DC

Wiring technique: 3-wire

Discrete output type: NPN

Discrete output function: 1 NO

Electrical connection: Cable

Cable length: 6.56 ft (2 m)