This PEN68 Digital Pen comes with 2 programmable buttons to improve your efficiency and it is designed to fit your left or right hand. Besides, it is compatible with Huion graphics tablets with 2048 levels of pen pressure like H420. Feature: Programmable Buttons -With 2 side buttons designed to be programmable, you can quickly achieve specific functions after setting them up. Comfortable to Hold -As silicone pad has applied on the area direct contact with your hand, it enables you to hold it comfortably. Easy to Use -Put a new AAA battery inside, press the power button, and start to use. Compatibility -It is compatible with Huion graphics tablets with 2048 levels of pen pressure like H420. Lightweight -It is only 22g in weight, enabling you to hold it for a long time without fatigue. Reversible Design -To fulfil using habit of different people, it is reversible, enabling you to use it in your left or right hand. Specification: Model: PEN68 Digital Pen Technology: Electromagnetic Resonance Button: 2 side programmable buttons Frequency: 250K Power supply: 1 AAA battery (Not included) Voltage: 1.5V Power consumption: 120uA Applicable product: H420 Item weight: 22g/ 0.78oz Item size: 149* 14* 14mm/ 5.87* 0.55* 0.55in Packing list: 1 * Digital Pen 4 * Pen Nibs 1 * Nib Clip 1 * User manual