2012-11-11

Active RFID tags have a transmitter and their own power source (typically a battery). The power source is used to run the microchip's circuitry and to broadcast a signal to a reader (the way a cell phone transmits signals to a base station). Passive tags have no battery. Instead, they draw power from the reader, which sends out electromagnetic waves that induce a current in the tag's antenna. Semi-passive tags use a battery to run the chip's circuitry, but communicate by drawing power from the reader. Active and semi-passive tags are useful for tracking high-value goods that need to be scanned over long ranges, such as railway cars on a track, but they cost more than passive tags, which means they can't be used on low-cost items.

2012-11-11

It depends on the vendor, the application and type of tag, but typically a tag carries no more than 2 kilobytes (KB) of data—enough to store some basic information about the item it is on. Simple "license plate" tags contain only a 96-bit or 128-bit serial number. The simple tags are cheaper to manufacture and are more useful for applications where the tag will be disposed of with the product packaging. The aerospace industry wants to store parts histories on high memory tag, which has led to the introduction of passive UHF tags that store 4KB or 8KB of data.

2012-10-12

GEENFC gurantee all the products exactly comply with all the strict factory quality criterions ( We are ISO9001 factory) before shipment. If found any damages of goods or unfunctional products, please keep the evidence ( Photos, video, bills...) and inform our service team to solve them.

Email: service@geenfc.com

Telephone:0086-755-23069800

2012-10-12

Yes, GEENFC gurantee all the products is 100% quality assured before shipment,  and all the products have their warranty times, the periods vary as models.

For tags/ cards/ keyfobs/ wristbands

1 years warranty time

For readers/ antenna/ rfid gates/ others

2 years warranty time

If any unfunctional or damaged products, please keep the records/ evidence( bill/ photos/ video) and inform our service team to solve it.

Service email: service@geenfc.com

2012-10-12

Yes, additional 0.5% of  total amount  tags/ cards will be backups for your replacement. But we only provide such service for  single order quantity over 1,000 pcs.

2012-10-12

Yes! We face to worldwide customers, and according to order size will suggest the best way of shipment.  Meanwhile a PI will be sent you for confirmation of all details, including Items you purchased, amount value, shipping terms, delivery time, etc.

2012-10-12

Large quantity: By sea, air, parcel, express ( DHL/ UPS/ FEDEX)

Small quantity: China post air mail / Hongkong post air mail

By Sea:

From: Shenzhen Port, China

To: Worldwide

Transportation time: As per volyage schedule, to west Euro: 17~ 21 days, to West coast of  North American: 12~ 20 days

By Air

From: Shenzhen Bao'an Airport , or Hongkong International Airport

To : worldwide

Transportation time: normally 1~ 3 days

By Express ( DHL, UPS, FEDEX..)

From: Shenzhen, china

To: Worldwide

Transportation time: 3~ 7 days

By Post parcel

From: Shenzhen, china

To: Worldwide

Transportation time: 15~ 27 days, to West Euro/ USA 12~ 17 days, to Latine America: 22~27 days

2012-10-12

You have multiple ways to select

Large quantity:  T/T ( Bank transfer), L/C ( letter of credit), Paypal/ Escow ( normally for invoice value not exceed to US $1000),

Small quantity: Paypal /Escow/ Western Union

2012-10-12

For large quantity or customized orders, normally takes 7 days to finished the whole process.

For retails or inventory purchase, it is shipped the day the order confrimed.

2012-10-12

Yes, please contact us and we will send you pricing information and lead times