Note: The color of the product we ship is the color in the first picture, and the specification and quantity are shipped according to the quantity and specification described in the title. If you need to change the color or style, you need to within 12 hours after placing the order. Our product description: Product Features : Human voice prompt.Auto low battery warning.Alarm menmory function.Auto detect sensor failure.Gas conentration displaying(PPM).Intelligent microprocessor control.High reliable semiconductor sensor.Power supply from AC 90V-240V OR 9V rechargeable battery.This detector adopt semiconductor sensor which is stable and reliable.It keeps the place safe from the threats of combustible gas(such as liquefied petroleum gas, natural gas, methane, etc). Specification : Product material: ABSColor: WhiteAC voltage: AC 9V-240V 50-60HzBattery Voltage: 9V rechargeable battery (not included)Working temperature: 0-50andiuml andiquest andcent andiuml andfrac34 andbdquo andiuml andfrac34 andfnof Environment Humility: 10 percent -95 percent Alarm Density: 3000PPM(andAcirc andplusmn 1500PPM)Alarm time: Keep alarming after over 3000PPMSize: 112x73x42mm (L x W x H)Plug: US or EU or UK Plug (We will be based on your country to send the corresponding adapter plug) Package includes : 1 x Gas Detector With Power Cable (Battery not included)1 x Screws Accessories Set1 x English Manual Details pictures : Note: Because the model and display effect of the monitor may be different, there may be slight differences in color, and the size is manually measured, there may be an error of 1-2cm, please understand. Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.