1. [Unique design]: wood color design for the elderly, suitable for most 5/1/0 threaded ink cartridges. Tube-shaped battery 900mah variable voltage, suitable for most 510 threads. 2. [Threaded stylus charger]: craftsmanship, impeccable performance and reliability. A power supply optimized for your rare viscosity. It can a perfect power supply under any conditions. 3. [Quick Charge]: Suitable for most 510 threads, durable. After being fully , it will automatically exit charging. 4. [Safety]: Built-in over-voltage protection, over-current protection, over-charge protection and short-circuit protection to charging safety. 5. [Applicable to]: Applicable to any . This is also an impeccable gift for Father's Day, a gift for lovers, family, boyfriends and . Battery capacity: 900MAH How to Use: clicks to turn on/off and three clicks to through Low (green) Medium (blue) and High (red) power . :ABS colour:Red Wood color Package Contents: 1 x 510 thread pen Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.