Gas Sensor Detector Carbon Monoxide And Smoke Alarm Detectors. Features: Power Supply: 3V, 2 AAA Batteries(Batteries Not Included) High Performance Mcu Provides Accurate Detection, Detection Range 30ppm~999ppm Alarm Memory Function Low Power Design, Battery Life of More Than 1 Year Alarm Concentration and Time: 50PPM, <90 Minutes 100PPM, <40 Minutes 300PPM, <3 Minutes Using Long-life Imported Core Source Sensor (more Than 3 Years), Providing 1 Year Quality Assurance Product Size: 62X62 Mm, Height 28 Mm The Plastic Shell Uses the Original Rubber Compound SPECIFICATIONS Operating Voltage: 3V Alarm Current:50mA Alarm Volume:85db Working Temperature:-1050 Degree Material: ABS Plastic Color: White Model Number: Smoke Detector Type: Smoke Detector Combination Warning Poisoning Gas LCD Display High Sensitive Package Included 1 X Carbon Monoxide Alarm 2 X Screws . We are an international seller, your order will be shipped from abroad so please allow the necessary time of minimum 14 working days for delivery right now depending on where you ship to, due to ongoing delays in postal deliveries globally.