This is a Panasonic Photoelectric Sensor. It's part number is EX-11B. It comes as pictured without any additional parts or accessories.

Specifications

• Manufacturer: Panasonic
• Part Number: EX-11B
• Body Style: Rectangular
• Series: EX-10 Series
• Connection Type: Cable
• Measurement Range: 0.15 m
• Operating Temperature, Maximum: 55 C
• Operating Temperature, Minimum: -25 C
• Response Time: 0.5 ms
• Supply Voltage: 12-24 VDC
• Type: Through Beam Sensors
• Current, Switching: 50 mA
• Light Source: Red LED
• Operation: Dark-ON
• Sensing Mode: Through Beam
• Technology: Photoelectric
• Voltage, Switching: 30 VDC
• IP Rating: IP67
• Output: NPN-Open Collector
• Cable Length: 2 m