Sony 在官方网站贴出了一项新配件 ES22 手写笔，就是配合 Xperia Z Ultra 手机的。
这支手写笔采用伸缩设计，可以拉长至一支笔般，而笔尖十分幼，只有 1.5mm。手写笔亦备有笔套连绳。
Interact with your Xperia™ Z Ultra touchscreen with speed and accuracy. Extend the stylus to full length for a pen-like experience. An ultra-thin (1.5 mm) point lets you write, point and draw in detail. Case and cord included.
Stylus ES22 for Xperia Z Ultra
http://www.sonymobile.com/global-en/products/accessories/stylus-es22/