D7YC Universal Active Stylus Pen For iPad Pro Phone Tablet for Smart for Touch Pencil For Apple for iPad Original 3rd Generationproduct advantages1. 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 switch3. Applicable to simple drawing, graffiti, handwritten bank signatures, online restaurant ordering4.POM pen tip reduces the resistance between the pen tip and the for touch screen, writing smoothly without hurting the screenIncompatible deviceHua 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 wellProduct disadvantages1. Can not prevent accidental for touch (can be equipped with gloves for preventing accidental for touch)2. Can'for t do accurate design painting3. 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 marketThe 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