Specification:Brand:AllsunModel:EM410Color: BlackFrequency range:100Hz-10kHzInput inpedance:>15MAmbient noise permitted:100dBBattery Type:9V battery(not included)Operation Temperature:-10-55Item Weight:175gItem Size:203 x 49 x 31mmPackage Information:Package Weight:1057g/2.33lbPackage Size: 260 x 265 x 110mm/10.24 x 10.43 x 4.33inPlastic Bag Package Features:1.It is an Electronic Stethoscope.2.Use ergonomics. It is easy and fast for user to use with simple key operation mode and comfortable hand feeling.3.It can rapidly detect diesel / gasoline engine cylinder mechanical noises emitted and accurately identify the fault location.4.But also on a variety of bearing operation status for quick identification.5.Suitable for automotive chassis ship operating conditions for monitoring.Description:1.Lightweight and portable, LED light indication.2.Adjustable headphone for detecting is included.3.And it is an essential tool for vehicle maintenance personnel.