Harmony Pen Battery
The Harmony pen battery is designed exclusively to work with the Harmony cartridges. The unit features an auto-draw system so there’s no need to press and hold a button.
A full battery can last upwards of 500 muffs before you need to recharge. Its small compact design makes it ideal for an on the go device.
- Lithium battery
- Up to 500 puffs per charge
- small compact form