SonarPen is a $30 iPad stylus that connects to the headphone jack - The Verge

An affordable alternative to the Apple Pencil

Smart Stylus for Android Chromebook

Design for drawing on iPhone. Supports palm rejection (for iOS device) and customize-able shortcut button, it turns any device into a powerful digital drawing tablet.

SonarPen - Pressure Sensitive Smart Stylus Pen with Palm Rejection and Shortcut Button. Battery-Less. Compatible with Apple iPad/iPhone/Android

MXCOIRTP Stylus Pen for iPad (2018-2023), Pencil 2nd

Smart Stylus for Android Chromebook

SonarPen is a $30 iPad stylus that connects to the headphone jack

This pressure-sensitive stylus makes almost any iPad mimic the

Stylus Pen for iPad 2018-2023, Magnetic iPad Pen, Apple Pencil,Tilt Sensor & Palm Rejection,Compatible with iPad 6-10,iPad Mini 5/6,iPad Air 3-5

平板配件｜SonarPen不插電智慧感壓繪畫筆，低成本入手- 鹹魚爸的3C新奇

SonarPen - Pressure Sensitive Smart Stylus Pen with Palm Rejection and Shortcut Button. Battery-Less. Compatible with Apple iPad/Pro/Mini/iPhone/Andr

Smart Stylus for Android Chromebook

Smart Stylus for Android Chromebook

SonarPen, a pen for any device with an audio jack, iPad, iPhone

MINI-STYLUS DUST PLUG 3.5mm headphone jack for iPhone 4s 5c 6 plus

SonarPen - Pressure Sensitive Smart Stylus Pen with

stylus accessories – SonarPen