ANKA Sci-Tech Co.,Limited is one of the leading China independent smoke detector,Website: , smoke detector, low cost standalone smoke detector manufacturers and suppliers, and also a professional company equipped with productive factory, we are always able to offer you cheap or low price independent smoke detector with reliable quality.why choose us1).2000 square meters factory, have capability to supply wide range of products2).Good quality control ,with competitive prices.3).Prompt delivery.4).Good after-sales service.5).No Minimum order quantity limited.OEM and ODM are also accepted.6).We locate in Shenzhen of China, easy for export.Product DescriptionSpecification:Power supply: DC 9V batteryStandby current: <12µAAlarm current: <10mAAlarm sound: >85dB (3m)Sensor type: PhotoelectricBattery life after low battery warning: >30daysTemperature range: 0°C ~ 49°C (32°F ~ 120°F)Humidity: 10%~90%RH (No icing or condensation)Executive criteria: EN14604:2005; GB4715-2005; Ul217Detecting area: 80m at 6-12m installation height; 60m at installation height <6m.Low battery warning; smoke alarm will chirp once every 40s to remind user of replacing a new battery.Auto reset.Sound and flash alarm; alarm sound louder than 85 decibel with red LED flashing .Test button; tests unit’s electronic circuitry, buzzer and battery function.SMT manufacture technology; high stability.Dustproof, mothproof and anti-white light interference design.Anti-RFI (20V/m-1GHz).Clear Picture：Our Services:1.We guarantee that all our items are "as stated" in their descriptions. We strive for 100% customer satisfaction on every sale we complete.2.We are manufacture, there is no middle man, no high markup, so we can provide quality items yet very competitive price.3.If you have any questions please contact us first, most are responded with in 12 business hoursPaymnet:1.T/T2.West Union3.Trade Assurance4.PaypalShipmet1,all package can sent by FedEx/DHL/UPS/EMS, based on customer requires.2,Freight By Sea to Any nearnest port of customer country.3,Freight by Air to airport of import country.Company InformationANKA is a high-tech enterprise specializing in the whole process of Research, Development, Manufacture and Marketing security alarm products. With the company policy of "Innovative technology, Makes safe life" and the responsibility of "Progress for protecting people's safety", FQA1.Quality of our company.We are the manufacturer of alarm system for more than 10 years, we are full of experience and technology.2.Quality of our products.Our engineers who ever worked in a very famous company of alarm system, all the products must be strictly inspected before selling.3.Quality of our services.All of our products have a full two-year warrantyand low repair rate.4.Quality of our shippment.We arrange the shippment as soon as we get the payment, fastly and professionally.5.Quality of our sales representatives.Truly, Warmly, Patiently, Professionally.