Compatible with iPad & iPad Pro 2018-2021: The stylus pen is compatible with iPad 2018-2021 series models: iPad 9th/8th/7th/6th Generation, iPad Air 3rd/4th Generation, iPad Pro 11", iPad Pro 12.9" 3rd/4th/5th, iPad Mini 5th/6th Generation. Please confirm your devices before ordering; other models are not applicable. Not compatible with models before 2018. The stylus pen is not compatible with iPad pro 1st&2nd, iPad pro 10.5", iPad pro 9.7", iPad 1st-5th Generation, iPad mini 1st&4th Generation, iPad Air 1st/2nd Generation. Not compatible with iPhone, Android, and Microsoft devices. Precise & Smooth The 1mm pencil tip can replace your finger to execute more precise instructions, easy to install and remove the pencil tips without any tools. No delay/lag/breakpoint! Compared with ordinary stylus, it has higher sensitivity, more accurate signal, and more comfortable hand. Not easy to break! Note: The pencil is not pressure-sensitive. Palm Rejection Design The stylus with palm rejection technology provides a natural writing feel and quick, effortless interaction with the screen, giving you more precision and control in front of the screen. We recommend using this stylus on iPad with a glass screen protector. Easy to Use & Extra-Long Standby. No need to install Bluetooth or apps, just turn on this active digital pen by a single touch of the button on the cap and it will automatically enter "sleep mode" after 5 minutes of inactivity to save power. 16 hours of continuous work, 120 minutes of charging, 365 days of standby.