Highlights: Device Type: End Device USB Power Supply: DC5V±10% 1A Backup Battery: 3.7V 680mAh(Standby 5 hours) Standby Current: ≤ 130mA  USB power Carbon Monoxide Sensor Type: Electrochemical Methane Sensor Type: Catalytic Carbon Monoxide Alarm: Refer to the table 1 Product Warm-up Time: 1 minute Gas Alarm Setpoint: 6% LEL Sound: ≥85dB/1m Operating Humidity: 20% – 90%, without condensation Operating Temperature: 0 ℃ – 55 ℃ Storage Temperature: -25 ℃ – 50 ℃ Weight: 157g (net weight) Dimension: Φ100mm * H30mm Color: white Housing Material: ABS flame retardant Description: ELECTROCHEMICAL CO SENSOR: INTEY carbon monoxide sensor is electrochemical sensor with high sensitivity that accurately detects carbon monoxide levels. The detection of carbon monoxide concentration exceeds the alarm requirements buzzer will issue “B,B,B…”alarm sound(85dB/M as loud as a blender）. The detection of the lowest CO concentration is 30PPM, and the fastest response time is in 3 minutes. USB & BATTERY BACKUP: The CO detector provides chargeable lithium battery, you don’t have to worry about losing protection if there’s a power outage. And once it is fully charged, carbon monoxide monitors can be in standby mode for up to six months USB charging plus built-in battery backup to make sure you’re in a safe life. DIGITAL DISPLAY: Carbon monoxide alarm will display CO concentration PPM(parts per million) level and battery status. And three LED indicators display three working status: Red LED for alarm mode, Yellow LED for fault mode, Green LED for normal operation, which changes color to indicate status, making it easy to tell at a glance if something is wrong SELF-TEST BUTTON: Pressing “Self-Test” to manual test the carbon monoxide alarm circuit operation to ensure the proper working and detect hardware failures. Normal mode: three lights will flash at the same time when you press it. HIGH QUALITY: INTEY carbon monoxide detector has been certified by CE and ROHS to ensure your safety. Whats in the box: 1 x Carbon Monoxide Detector SKU: 210918113812 Weight: 0.3