Hign-concerned Chemical: None Type: Module Condition:New HXFB Ultrasonic Module Robotics/Smart Cars/Maker Experiments This ultrasonic module offers stable performance, precise distance measurement, high accuracy, and a small blind spot. Applications include DIY smart car ranging, obstacle detection, automotive reversing radar ranging, electronic experiment development, smart farm surveying, industrial instrument testing, and more. Operating Voltage: 3.3-5V Operating Current: 5.6mA (5V) 2mA (3.3V) Ultrasonic Transmission Frequency: 40kHz Measuring Range: 5m Detection Accuracy: 1mm Dimensions: 46 x 30.5 x 15mm Weight: 10g It's DIY kits, needs to finish by yourself. Color: Black Material: ABS Package Contents: 1 * Obstacle Avoidance Module 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.