Function: 1. Abnormal Noise Detector: High-performance diagnostic tools, especially for noise detection, which can easily identify early motoring problems and facilitate car repair as soon as possible. 2. Multi-channel: when the generator is running, it can detect the impact of vibration due to failure of the bearing, gear, valve, crank, cylinder, gearbox, body noise etc. 3. Quick detection: The car noise stethoscope can quickly detect the emitted mechanical sounds of the oil / gasoline engine cylinder and accurately identify the fault location. 4. Ergonomic design: The machine noise detector is easy and quick to use for the user with the simple key operation mode and comfortable hand feeling. It is suitable for the working conditions of the automotive undercarriage transmission for monitoring. 5. Easy operation: Six-channel acousto-optical sync, simple and comfortable headphones, and the volume can be freely adjusted, you can choose the channel you want to receive and send the sound to the headset. Specification: Item Type: Electronic Stethoscope Black colour Frequency range: 100Hz-10kHz Input impedance: greater than 15M ohms Permissible ambient noise: 100dB Battery type: 4 pcs AAA battery (excluded) Working temperature: -10-55 Package List: 1 x Electronic Stethoscope 6 x sensor 1 x Headphone Extension cord 3x5 meters Extension cord 3 x 3 meters 1 x storage box