Feature: 1. Essential and Portable: The engine noise diagnosis scope mechanics tool is a basic and necessary portable electronic instrument for inspecting machine malfunctions. 2. Comprehensive Diagnosis: The electronic stethoscope diagnostic kit detects defects and malfunctions in running components such as bearings, gears, valves, cylinders, transmissions, and bodies, which are caused by impacts and vibrations. 3. 6 Channel Sensor: Equipped with six sensors and a 4.8 meter long wire, the kit provides high sensitivity, strong resolution, good anti interference capability, and accurate judgment. 4. Comfortable and Noise Isolation: The headphone is designed with a soft ear cover that perfectly fits the contour of the ear, effectively isolating external noise and ensuring comfort and sensitivity. 5. Easy to Use: The electronic stethoscope kit is user friendly and compatible with various machines and engines. It allows for easy inspection and diagnosis of faults, improving efficiency. Specification: Item Type: Electronic Stethoscope Kit Material: Aluminum Battery: Dry battery 9V6F22 x 2 300mah (matching) Characteristic: The automotive chassis system ears electronic stethoscope kit is specially designed and developed for checking abnormal noise of car engine, abnormal noise of car body and abnormal noise of chassis, etc, which can easily identify the early problems of the car and solve it in the first time . Package List: 6 x Sensor1 x Pickup1 x Headphones1 x 6 Channel Sensor Selector Unit2 x Battery6 x Ties1 x Instruction Manual1 x Iron Pin1 x Plastic Case (Random Color)