4 AA Battery Zinc Alloy Smart Lock For Main Door M16

1. Are you a factory? Yes, our factory is 22 years old. 2. Do you have any certificate of the product? Yes, we have. Such as CE, ROHS etc. 3. If I want to buy a sample for checking the quality in advance, is it ok? Sure, the sample lock is available before normal order. We can send the sample to you via DHL, FedEx, TNT, EMS etc. 4. What's your payment term? Thank you for your question, there are Western Union,T/T or L/C. 5. How long for your warranty? We offer 1 year for our products. 6. Is it convenient to visit your factory? Warmly welcome.