We are not work on saturday, sunday and all chinese holidays.Thank you very much for all your supports, we will do our best to offer the best products to you. Ecg & ekg systems handheld 1ch ecgekg machine electrocardiograph fda. Your satisfaction is all we want to do. FI there are any other needs or requirements, please feel free to contact. The sale of this item may be subject to regulation by the u. Food and drug administration and state and local regulaotry agencies.