SIMPLIFY ONSCREEN NAVIGATION: Use the pen to write or draw onscreen or interact with your touch applications. Integrated pressure sensors help you control the width of your drawn lines.EASY TO USE: Once in range, your device detects the pen and cues you where to place it onscreen. Erase, highlight, and click on your content with the two convenient side buttons.BATTERY AND POWER: Uses 1 batteryTECHNICAL NOTES Tip Diameter: 1 mm Pressure Sensitivity: Yes (2048 levels) Tilt Operation: Yes Palm Rejection: Yes Hover Reading Height: 8mmMINIMUM SYSTEM REQUIREMENTS: Windows 8.1COMPATIBLE WITH: HP 240 G6 HP Elite x2 1012 G1 HP Elite x2 1012 G2 HP EliteBook 1040 G4 HP EliteBook x360 1020 G2 HP EliteBook x360 1030 G2 HP Pro x2 612 G2 HP ProBook x360 11 G1 HP ProBook x360 11 G2 HP ProBook x360 11 G3 HP ProBook x360 11 G4 HP ProBook x360 440 G1 HP Sprout Pro G2COLOR: Grey MATERIAL: Metal + PlasticPACKAGE CONTENTS: 1 x Active Tablet Stylus Pen 1 x USB CableNote: Light reflection and different displays may cause the color of the item in the picture to appear slightly different from the real thing. Measurement may vary by +/- 1-3 cm.