Check the listing for details. 3-in-1 CO Detector Carbon Monoxide Detectors Plug in with Temp/Hum Sensor US 2pc. Color: White, Condition: New. Listed at 12.99 USD. Carbon Monoxide Detectors Plug in, 3-in-1 CO Detector with Temp/Hum Sensor, Portable Travel Carbon Monoxide Alarm with 85dB Alarm, Real-Time CO Monitor Easy to Read & Install (Black-1 Pack) Product Details Style: BK 3-IN-1 (CO+T+RH) Power Source: AC Color: Black Product Dimensions: 1.3"D x 2"W x 3.5"H Item Weight: 2.08 ounces Alarm: Audible, Visual Operating Humidity: 5% to 95% RH Upper Temperature Rating: 140 Degrees Fahrenheit Sensor Type: Electrochemical Brand: ‎Lunarlipes Style: ‎BK 3-IN-1 (CO+T+RH) Power Source: ‎AC Color: ‎Black Product Dimensions: ‎1.3"D x 2"W x 3.5"H Item Weight: ‎2.08 ounces Alarm: ‎Audible, Visual Operating Humidity: ‎5% to 95% RH Upper Temperature Rating: ‎140 Degrees Fahrenheit Sensor Type: ‎Electrochemical Material: ‎ABS Number of Items: ‎1 Manufacture.