Caution:This is not Changeable Writable keyfobs key tags (Not UID tag),If you want UID, please have a see follow link :

https://www.aliexpress.us/item/3256805807993121.html?gatewayAdapt=glo2usa4itemAdapt

Color: random(please leave message what color you want,or we will send by random.thanks)

Features:

Features:This order: S50(Compatible)chips

100% Brand New

Size:3.5 x 2.8 x 0.4cm

Material: ABS

Operation frequency: 13.56Mhz

Detecting distance: 3-10cm

Easy to carry

Water resistant

Each comes with Key ring included

No external power required.

Brand new key inductive card for entrance guard system.

It applies to access control, hotel locks, staff attendance and school campus access and payment control, identification and security systems, parking lot entry and payment, social security management, transportation payment, municipal and ancillary service payment.