Copoz Wall-mounted No-Contact Forehead Digital Infrared Thermometer Wireless Doorbell,Copoz AZ1632 Product descriptionWall Mounted Infrared Thermometer with Smart Doorbell Non-Contact Automatic Induction Thermometer Bluetooth TransmissionFeature:Switch between degree centigrade /Fahrenheit at will.1 Second extremely fast infrared temperature measurement.Bluetooth function transmission, Cell phone can download and use.High-temperature alarm prompt, abnormal temperature flashes red, the alarm sounds to remind.Fifteen days of energy saving and long battery life, can be plugged in all the time, longer battery life.Two power supply modes, removable battery (not included) and direct power supply (not included) for use.The infrared electronic doorbell thermometer is both a thermometer and an automatic doorbell.Descriptions:Weight: 60 gramsMaterial: ABS PCDisplay: digital displayDimensions: 60*100*18MMResponse time: 0.1 secondsInput voltage: USB/DC5VStandby time: about 15 daysMeasuring range: 0~50 degree centigradeTemperature measurement accuracy: ¡ 0.2 degree centigradeWorking temperature: 10 degree centigrade-40degree centigrade C(15-35 degree centigrade recommended)Alarm mode: automatic alarm for abnormalities, beep soundTransmission interface: USB Android standard interfaceMeasuring distance: 5cm-15cm automatic measurementInstallation method: hanging, double-sided tape, bracket fixedPower supply: 2 AAA batteries (not included) or power supply (not included)Package Included:1 * Wall-Mounted Thermometer1 * Double-sided tape1 * Instruction