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What’s minimum quantity of one model?
300pcs/model,three colors.
Could I make my own brand?
Yes,we are OEM manufacturer and welcome your design and logo.
Are you manufacturer or trading company?
We are manufacturer Robo optics,and Robo Imp.&Exp is our exporter. 
How long is your delivery time?

Usually 75-90 days.

What’s certification do you have?

CE,FDA, ISO

What’s your payment term.
30% deposit before production,70% before shipment. 
what’s your quality and after sales service?

 Each piece will be checked carefully and reach you in good condition.If really with quality problem ,don't worry,contact with us, we will solve the matter to your satisfaction.

Can I get free samples?

Yes,but we will charge you sample fee first,and return the cost back after placed order.