Our HID 1346C ProxKey III Key Fobs are designed to work seamlessly with HID proximity readers to provide secure access control. These key fobs are RF programmable (26-bit) and can be easily attached to keyrings and lanyards. The battery-free design ensures an infinite number of reads.Available in packs of 100RF Programmable (26-bit)Dimensions: 3.95 x 3.18 x 0.60 cm