The X-Sense ZASXS00139WEU smoke detector (model XS0B-MR) is a standalone photoelectric device designed for fire protection in residential spaces. It features a sealed long-life battery (designed for approximately 10 years of operation), automatic self-check, insect protection mesh, loud siren (≥85 dB at 3 meters distance), low battery sound, and a mute/test button. It does not require Wi-Fi, a control center, or an app. Dimensions approximately 110 mm diameter × 33 mm height, weight approximately 110 g, housing made of ABS plastic. The package includes the smoke detector, mounting base, screws, wall plates, and user manual.