Specification Brand : Ubden BulletPoint : Type:Other BulletPoint1 : High sensitivity and normal conversation is detected within 32.8 ft (10 m) in closed environment BulletPoint2 : Uses an original high sensitivity beautiful head and a LM 2904 compute amplifier, low power consumption, and low overall harmonic distortion BulletPoint3 : When collecting operations using ADC chips, we suggest pulling 1 K-10K pull down resistance from the outside to the ground BulletPoint4 : Color may vary slightly due to different monitors and different photo shooting conditions. BulletPoint5 : 【Package Content】- 1Pcs x Electronic Module; Color : Il-300 ExternallyAssignedProductIdentifier : 7775191332096 IncludedComponents : see details ItemName : Analog Volume Decibel Detection LM 2904 Sound Intensity Detection Module Noise Acoustic Control Sensor Mimi Head Module ItemPackageDimensions_Height : 1 centimeters ItemPackageDimensions_Length : 13 centimeters ItemPackageDimensions_Width : 13 centimeters ItemPackageQuantity : 1 ItemTypeKeyword : sensor-blocks Manufacturer : UBDEN Material : Copper NumberOfItems : 1 PackageLevel : unit PartNumber : 1 ProductDescription : Product Features: 1. Adopts an original high sensitivity beautiful head and a LM 2904 compute amplifier, with low power consumption and low overall harmonic distortion. 2. High sensitivity, normal conversation is detected within 32.8 ft (10 m) in closed environment. 3: It can directly output the linear analog amount, making it more convenient when collecting AD. Many customers have decided that the pain of directly collecting the waveform. It can be used as a direct decibel sensor (programmed algorithm conversion required). Recommended Use: 1. The wavelength is as small as possible, and it can supply power with a stable power supply. 2. The weakness point has a greater amplitude and increases the power supply voltage of the module, but should not exceed the allowable range. 3. When collecting operations using ADC chips, we suggest pulling 1 K-10K pull-down resistance from the outside to the ground. Specifically, you can choose the corresponding model number of resistance according to the actual situation.