1. We rent each set ink cartridge (included four or six ink cartridges) for $19 per month to our customers.

2. The custom cartridges allow the user to refill ink through the out ink bottle.

3. Average 28 ml ink will cost you $2.99.

4. The out ink bottle can hold 90 ml ink.

5. We do free replacement for the ink cartridge for you during the rental period.

6. A continuous ink attachment included four or six ink cartridges with 90 ml ink in each bottle for $99.

7. Free try one month available with shipping, and handle charged $ 39.