HID Corporation The ProxKey III is a proximity card keyfob for access control offering HID proximity technology in a convenient, pocket size device. The proximity card keyfob easily attaches to a key ring, badge clip or lanyard. The ProxKey III is built to withstand harsh operating environments or handling. The ProxKey III is suited for use in access control applications where a Photo ID is not required. Using HIDs ProxProgrammer, card vendors can ship proximity keyfobs, custom programmed to their customers requirements, from their own inventory. Enables smaller order quantities and overnight delivery. Keyfob construction: ultrasonically welded ABS shell with TPE insert. Lifetime warranty.