The stethoscope is the most basic and necessary portable simple instrument for checking vehicle failures. Can be detected in the machine running the bearings, gears, valves, valves, crankshaft, cylinder, gearbox, body ... ... and other operating parts of the defects and failure caused by the impact of vibration. Help maintenance personnel find the root of the problem, save time and improve efficiency. Applications: 1. Products applicable to all parts of the car, you can quickly monitor the abnormal parts of the site. 2. Products can monitor the engine, bearings, motors, chassis, gearbox and other parts. 3. Products suitable for maintenance technicians, repair workers, vehicle maintenance personnel, safety monitoring personnel, personal owners and other use. 4. Products applicable to the automotive, ships, aircraft, machine tools and other machinery and equipment. 5. Position the collision sound and screams from the engine to the dashboard; 6. Diagnosis of the piston slap sound, gear wear sound.   Product characteristics and technical parameters: Detection noise frequency range: 10HZ - 10KHZ Shock-proof hand-held mechanism; The length of the two probes: the long needle is 220 mm, the short needle is 80 mm, the diameter is 4 mm; Blister paper card Packing: Package size is 42.5 13.8 3.5 cm; Product standard configuration: 1. Stethoscope host: 1 set 2. 220 mm probe: 1 pcs