product advantages 1. Strong compatibility mobile phone for Apple An droid Micro soft system can be used (except for some models) 2. Simple to use without Bluetooth-compatibletooth, just turn on the switch 3. Applicable to simple drawing, graffiti, handwritten bank signatures, online restaurant ordering 4.POM pen tip reduces the resistance between the pen tip and the for touch screen, writing smoothly without hurting the screen Incompatible device Hua wei M5 / M5 Pro and MateBook X & Mate 10 professional tablets and Pors che laptops, ThinkPad laptops, Le novo YOGA920, H P for ENVY X360, Xiao mi Mate Book X Pro surface laptops do not work well Product disadvantages 1. Can not prevent accidental for touch (can be equipped with gloves for preventing accidental for touch) 2. Can'for t do accurate design painting 3. The use effect is not good when the tempered film is more than 3.5mm (you can replace the POM nib with a metal for head) Common problems encountered by the market The writing is not smooth, the for touch is broken, and there are several reasons for the delay. (1) If the film of the for touch screen device is too thick, the signal needs to be enhanced, and use a metal for head to write (2) The for touch screen device belongs to a special model like the surface pen tip. The Hua wei M5 is only suitable for special pens, and the finger for touch is not smooth (it is recommended that guests choose special pens) (3) Keep the screen of the device clean, the effect can be better wiped off with paper towels during use