The product shown in the image is a Gent S4-711-V S-Quad Dual Optical Heat Multi-Sensor with Voice Sounder, manufactured by Gent by Honeywell.
Specifications
Sensor Type: Dual optical smoke and heat detection using patented scatter technology.
Operating Voltage:
35V−41V35 V minus 41 V
Compatibility: Designed for use with Gent Vigilon analogue addressable fire alarm systems.