1. Bluetooth real-time power display. 2. Support custom shortcut keys. 3. The scrub pen tip can be replaced. 4. No need to link Bluetooth and APP, long press the pen head for 3 seconds, you can use it. 5. 45 degrees, you can tilt sensing 4-5 different pressure sensations. According to different tilt angles, you can adjust the thickness of the pen. 6. Battery: 140mAh