Features: 1.Automotive abnormal sound detectors are based on 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.The multi-Channel automotive noise finder is a portable piece of equipment to diagnose the defect with in a vehicle. Example, when a generator is running, it can detect the impact of vibration due the failure of a bearing, gear, valve, crank, cylinder, gearbox, vehicle body noise, etc. 3.Use ergonomics. It is easy and fast for user to use with simple key operation mode and comfortable hand feeling. 4.It can rapidly detect crude oil / gasoline engine cylinder mechanical noises emitted and accurately identify the fault location. 5.Suitable for automotive chassis ship operating conditions for monitoring. Easily pinpoint troubling noises that cannot be duplicated in a repair stall and only occur during road driving. Specifications: Weight: 1.14KG Color: black Frequency range:100Hz-10kHz Input inpedance:Greater than 15M ohm Ambient noise permitted:100dB Battery Type: 4 AAA batteries (not included) Operation Temperature:-10-55 degree Material: ABS Size: extension cord: 5m Package Included: 1 * electronic stethoscope 6 * Sensor 1 * earphone 3 * 5m extension cable 3 * extension cable Notes: 1. Please allow 0-1 inch error due to manual measurement. Thanks for your understanding. 2. Monitors are not calibrated same, item color displayed in photos may be showing slightly different from real object.