Yes, We are factory ,and have more than 10 years experience in this field.
Yes,we can help to print your logo on the lock and OEM,ODM service are welcome.
If the voltage lower than 4.8V,door lock will alarm notification when you use the card to open the door every times.and each lock have an external power supply Interface.
MOQ is 20 sets. And we can send sample to have a test.
Sample within 3 workingdays,quantity order takes about 5-7 days.
DHL, TNT, UPS, FEDEX express way; By sea; By air; customers forwarder etc.