HP Spectre Rechargeable Stylus Pen

Model / Name: HP Rechargeable MPP 2.0 Tilt Pen (for Spectre / Envy devices)
Part Number: 3J122AA
Protocol: Microsoft Pen Protocol (MPP) 2.0
Pressure Sensitivity: 4,096 levels
Tip / Activation Force: Very low activation force (~9 g)
Tilt Support: Yes – supports tilt for shading / drawing effects
Buttons: 2 customizable side buttons
Battery / Power: Rechargeable via USB‑C
Battery Life: Up to ~30 days (depending on use)
Low Battery Indicator: LED blinks when pen needs charging
Replaceable Tips: Yes – includes 2 extra tips
Magnetic Attachment: Yes – can attach magnetically to compatible devices
Palm Rejection: Supported – rest your hand on the screen while using it
Dimensions / Weight: ~14.95 cm length, 0.95 cm diameter, weight ~14.5 g
Warranty: 1-year limited warranty
Compatibility: Works with HP devices that support MPP 2.0, including Spectre x360 series