Capacitive microphone sensor: high-precision sensor with excellent sensitivity and accuracy LED-backlit -screen display: high-intensity backlit screen, easy to deal with harsh environments such as strong light/night. windshield design: more accurate sound collection, Filter the effect of wind on sound Multi-collar city application: factory/workshop/school/residential/office/traffic road and other occasions. Material: plastic colour: black Package Contents: 1 x Decibel Detector (without battery 3X AAA battery) Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.