IR Infrared Motion Sensor, Activated Voice Welcome Doorbell, DingdongPlus16 MusicPlusAlarm Sound Door Bell Entry Alarm for Shop Store/Home with Built-in Speaker

Specification: Color: White Material: ABS plastic Sound: The first Level: Welcome The Second Level: Dingdong +16 music + alarm sound (adjustable) Battery: 3 AA batteries (not included) Remote Detection: 0-6 meters  Applicable Temperature: 0-25 degrees Installation and Use Method: 1. Push the battery cover on the back of the doorbell in the direction of the arrow, install 3 AA batteries (alkaline batteries are recommended) and cover the battery cover. 2. Turn the doorbell switch to the voice or alarm level. 3. When a guest enters, the welcome doorbell will sound what you have chosen before. Package List: 1 x Welcome Sensor  2 x Base Note: 1.Each time the battery is installed, the product needs to be self-tested for about 15-20S, and then enter the normal working state. 2.Sensitivity and volume have been set in standard state, not adjustable. 3.If the product has an automatic sound or abnormality, please check the battery power supply or the installation position is correct. 4.Avoid directly facing the illuminating light / sunlight / reflection / direct exposure, if the ambient temperature is too high (above 30 degrees), the device will appear from far to near, which is in normal. 5.When the doorbell sound is weak, please replace the battery. The doorbell should be installed in a position where the direct air flow changes greatly (such as air outlet, exhaust fan, electric furnace, etc.), not installed in the sun or rain.