2nd Gen European Plug-in CO Detector with LED Display, Battery Backup, Temperature & Humidity Monitor 3-in-1 Carbon Monoxide Alarm (Non-Smart)

Create an extra layer of indoor safety with the 2nd Gen Plug-in Carbon Monoxide Detector, combining CO detection with temperature and humidity monitoring in one compact device. The built-in LED display provides an easy way to view environmental readings without relying on a smartphone or external device.

Simply plug the detector into a compatible European-style wall outlet and it is ready to monitor. There is no wiring or complicated setup required. When dangerous carbon monoxide levels are detected, the electrochemical sensor provides a ≥85dB audible alarm and visual alert to draw attention to the potential hazard.

A built-in 1000mAh rechargeable backup battery helps maintain monitoring during temporary power failures, providing an additional layer of protection when mains electricity is unavailable. With its compact size and convenient plug-in format, the detector can be used in bedrooms, apartments, hotels, dormitories, RVs, rental properties, and other indoor environments.

This is a non-smart standalone CO detector, so no Wi-Fi connection, mobile application, or smart home hub is required for basic operation.

• Continuous CO Monitoring with Backup Power: The detector is designed to monitor carbon monoxide continuously while connected to a compatible European outlet. If a power interruption occurs, the integrated 1000mAh backup battery helps keep the detector powered so monitoring can continue temporarily.
• One Device for CO, Temperature and Humidity: More than a basic carbon monoxide alarm, this 3-in-1 detector combines CO sensing with temperature and humidity measurement. The LED display makes the readings easy to check directly from the detector.
• Sensitive Electrochemical Sensor for Reliable CO Detection: Featuring an electrochemical CO sensor, this detector is designed to provide sensitive, stable, and reliable carbon monoxide monitoring. It helps detect elevated CO levels and trigger timely audible and visual alerts when a potential hazard is identified.
• Simple European Plug-in Installation: Set up the detector without drilling, wiring, or additional installation tools. Its compact European plug-in design is suitable for convenient placement in bedrooms, living areas, apartments, dorms, hotels, RVs, rental homes, and other indoor spaces.
• 85dB+ Audible Alarm with Visual Warning: When carbon monoxide reaches a hazardous level, the detector responds with both sound and light alerts. The audible alarm is rated at 85dB or higher, helping occupants recognize a potential CO hazard promptly.
• Note: This product is non-intelligent and cannot be controlled by cell phone.

• Model: NA503B
• Carbon Monoxide: 0~999PPM (±10%）
• CO Alarm Threshold: 49 PPM (Initial Default)
• Temperature Measurement Range: -10°C~50°C 
  (±1.5°C)/14°F~122°F (±2.7°F)
• Humidity Measurement Range: 0%–95% RH 
  (±5%), non-condensing
• Input: 100-240V 50/60Hz Replaceable 
• Shell: Flame Retardant ABS Plastic
• Work Temp: -10°C~50°C/14°F~122°F
• Alarm: Yes
• Product Size: 125.5x60.5x36.3mm(Excluding the plug)