But in case it has any problem, we offer 1 year free warranty and lifetime after sales service. Which means, within 1 year, we will offer free spare parts, and we will pay the shipping cost to our clients. If beyond 1 year, we still offer free after-sales support. In case client need any spare parts, we only charge the lowest cost.
In last year our after-sales manager's whatsapp number was banned, so she have to changed to a new number. She have send new number information to all our clients, even who has only bought 1 portable model in years ago.
For some clients who did not reply to this message, she send more than 1 time, just to make sure, every of our client knows she has chnaged the number, and in case they need any help, they can find our after-sales manager fast.