Cheap And Discounts 1pc/Lot 125Khz RFID TK4100 EM4100 Read Only Waterproof Proximity Smart Card Wristband Bracelet ID Card for Access Control Wholesale. Buy Directly From Merchant Shenzhen Lanhong technology company. Enjoy ✓Free Shipping Worldwide! ✓90 Days Buyer Protection. ✓Easy Return. ✓Money Back Guarantee.