It checks the distinctive nature of deafness - sound conductive deafness or sensorineural deafness. When using the fork handle clamp, with a soft rubber mallet or other elastic body percussion, sound waves may be produced. Convenient to use. Perfect for doctors, nurses and healthcare professionals, etc. Used to test patients' hearing as well as vibration sensitivity in cases of nerve damage. Material: Aluminum Alloy Color: Silver Package Contents: 1 x Drumsticks (The color and style are random, and the specified color and style cannot be selected) 6 x Tuning Forks with Massage Ball (128Hz 256Hz 512Hz 1024Hz 2048Hz 4096 Hz) Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in a little different from the real thing. The measurement allowed error is +/- 1-3 cm.