All ECOVACS products purchased in the ECOVACS HK online store are delivered by the Hong Kong agent Dah Chong Trading Co., Ltd. (it is expected to be shipped within 4 working days, and the delivery person will contact you one working day before arrival. You can also negotiate with the deliveryman about your ideal delivery date, and we will try our best to arrange it) and after-sales maintenance services. After the online payment process is completed, returns, refunds, exchanges, and order cancellations are not accepted for all goods.