wireless ordering system for restaurant/coffee shop

Step 1.The call bells are placed on the table, when a guest want to be served,he presses the bell which sends signal to the receiver.
Step 2.The receiver receives signal:
Watch receiver vibrates and shows the call bell's number;
Display receiver ‘s screen shows the call bell's number and broadcasts the number;
Step 3.Then the waiter who hears the broadcast or wears the watch receiver will offer the service to guest on time

Application scenarios of wireless waiter call system
Now wireless waiter call system has been widely applied in the telecommunications, banking, securities, insurance, hospital, civil aviation, public utilities, Sea beach, coffee house, KTV, SPA, nurse homes, manufacturing and other industries.  

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Q1. what is the "lead time" ?
Sample: 1-5 working days
batch order: 10-15 working days for order less than 5000 pcs.
custom order: need confirm again.
Q2. what is the "payment terms" ?
Sample: we accept paypal and personal bank account transfer.
order less than 3000$: paypal; T/T (telegraphic transfer) ; western union or others confirmed; 100% payment in advance; so to avoid twice handling charges of both sides.
Q3. what is the "shipping methods" ?
General; we delivery goods using internetional express; which is faster (5-10days); like DHL, EMS, UPS, FEDEX, TNT, Hon Kong Post Air Mail, Aramex.ect. we also could delivery by sea transportation, air transportation as U need.
Q4. what is the "warranty Period" ?
We give 1 years warranty for our products.
Q5:How to customize?
We can customize some of our products according to your requirement. put your logo on the types; we also could customize some products as your designs or find some suppliers for U (OEM/ODM). we need confirm more specifications when U really need; and leading time will be 1-3 weeks longer.