1.28-inch color liquid crystal display (LCD), 320 x 240 pixels. User-adjustable O3 alarm threshold to notify you when ozone concentrations rise. Key benefits Immediate safety alerts: set a custom O3 alarm threshold so you are notified of elevated ozone levels before they become a hazard. Portable, ready when you are: handheld, compact housing and small size make it easy to carry and use for spot checks anytime. Reliable operation: high-capacity 2000 mAh lithium battery with USB charging and low-battery warning for uninterrupted monitoring. Core features Display: 1.28-inch color LCD with 320 x 240 pixel resolution for clear readings and status information. Alarm: User-settable O3 threshold to trigger audible/visual alerts at levels you define. Design: Handheld form factor and compact housing for easy transport and on-the-go measurements. Applications: Designed to detect residual ozone after disinfection and to measure ozone in both indoor and outdoor environments. Power: 2000-mAh lithium battery, rechargeable via USB; includes low battery warning. Typical use scenarios Post-disinfection verification: Check for residual ozone levels in offices, treatment rooms, or public areas after ozone-based disinfection to ensure spaces are safe for re-entry. Indoor air quality spot checks: Monitor classrooms, meeting rooms, or residential spaces for elevated O3 concentrations during and after maintenance or cleaning procedures. Outdoor or mixed environments: Perform quick checks outdoors or at facility entrances where ozone exposure may be a concern. What this product solves Prevents accidental exposure by alerting users to elevated ozone levels. Provides a compact, portable tool for verification of disinfection procedures and routine air-safety checks. Reduces downtime uncertainty after ozone treatments by giving clear residual ozone measurements. Specifications (as provided) Display: 1.28-inch color LCD, 320 x 240 pixels Alarm: User-adjustable O3 alarm threshold Design: Handheld, compact housing, easy to transport Applications: Detection of residual ozone in offices, indoor and outdoor use, and post-disinfection checks Battery: 2000-mAh lithium battery, USB charging, low-battery warning