Tip: Half-drill push pin Output: 4mv Impedance: 450Ω Frequency response range: 10HZ-30KHZ Resolution: Greater than 25DB Balance degree: 0.5DB Impedance matching: 47KΩ Recommended needle pressure: 2g Effective acupuncture pressure: 1.9g-2.4g Time to enter the state: 25h Material: Plastic + Metal colour: Random Color Note: Random color, don't accept the specified color. Package Contents: 1 x M1 Diamond Stylus Only the above package content, other products are not included. Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.