Features: 1.High?performance diagnostic tools for the repair of advanced technology development, especially for noise that can easily identify automotive early problems and facilitate car repair as soon as possible. 2.Portable piece of equipment to diagnose the defect with in a vehicle. When a generator is running, it can detect the impact of vibration due the failure of a bearing, gear, valve, crank, cylinder, transmission, vehicle body noise, etc. 3.Use ergonomic design. Simple button operation mode and comfortable feel make it easy for users to use. Very user-friendly design. 4.It can quickly detect the mechanical noise emitted by the cylinder of a crude oil/gasoline engine and accurately identify the location of the fault. 5.It is suitable for automotive chassis transmission operating conditions for monitoring. Specification: Item Type: Car Electronic Stethoscope_x000D_ Material: ABS+PVC+Copper_x000D_ Description: Easily find out the noise that is difficult to solve. These noises cannot be found in the maintenance booth and only occur during road driving._x000D_ Colour: Black_x000D_ Frequency Range: 100Hz-10kHz_x000D_ Input Impedance: Greater Than 15M Ohm_x000D_ Allowed Environmental Noise: 100dB_x000D_ Battery Type: 4 x AAA Batteries (Not Included)_x000D_ Working Temperature: -10-55 PackageList: 1 x Car Electronic Stethoscope 6 x Sensor 1 x Headphone 3 x 5m/5.5yd Extension Cord 3 x Extension Cord 1 x Instruction 1 x Storage Box