Sell Detector and Carbon Monoxide Detector Alarm with LCD Display and 3 Battery best price

[Combination and Carbon Monoxide Detector]: Equipped with both photoelectric sensor and electrochemical CO sensor that work independently of each other; detects both fast and slow-burning fires, and instantly notifies you when dangerous or CO concentration is detected while minimizing false al; provides the ultimate protection from 2 deadly threats, all contained in 1 unit. [LCD Display and Low Battery Warning]: Clearly indicates real-time carbon monoxide (CO) concentration in the surrounding air, as well as Low battery reminder, when the power is close to run out,the red light flashes every 10s and the LCD displays "LB",you won't miss the chance to change the new Battery. [Indicator light]: Under normal working conditions, the green light flashes once every 30 seconds. [Easy Installation without Hardwired]: Requires no rewiring; easy to mount on any wall or ceiling with the included 3*AA 1.5V Batteries, screws. Colour: white Material: ABS Package Contents: 1 * alarm 1 * Screw pack 3 * 1.5V AA Battery 1 * English manualOnly the above package content, other products are not included. Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.