Features: 1.Multipurpose: Metal detector non contact module can be used in game entertainment, car detection, elevator floor control, equipment location detection. 2.PCB Board: The double sided wiring of the PCB board, the welding pads are sprayed with tin, and the pads are not easy to fall off after multiple soldering, and the use is more reliable. 3.Welding Assembly: Simple circuits are easy to assemble, train your soldering skills during the assembly process, and are indeed a fun soldering exercise for beginners. 4.Size: The dimensions of this metal detector non contact sensor is approx 66x61mm / 2.6x2.4in, the maximum detection distance is 5cm / 2in. 5.High Reliability: Professional manufacturing, metal locator electronic kit has high accuracy, stable performance, strong reliability, making sure safety use. Specification: Item Type: Metal Detector Module Material: PCB Uses: Can be used in game entertainment, car detection, elevator floor control, equipment location detection Power Supply Voltage: 3-5V Dimensions: Approx. 66x61mm / 2.6x2.4in Maximum Detection Distance: Approx. 5cm / 2in PackageList: 1 x PCB Board 2 x Connecting Line 2 x Resistance 1 x Adjustable Resistance 5 x Capacitance 1 x Buzzer 3 x Triode