based company with Guaranteed Customer Satisfaction. Total 100 Pcs Round RFID Key FOB, Can be Re-Writable Multiple Times. Compatible with MIWA, ILCO, SECURELOX, DELUNS, and 13.56 MHz frequency locks. Works with PN532. Not compatible with upgraded versions of SAFLOK, ONITY, ULC, Ultralight Systems, Vingcard, Beline, Salto, Orbita, Suretech, Acculock, or Betech locks. Works only on 13.56 MHz frequency. Does not work on 125 kHz frequency. Commonly used by the hospitality industry as a Master Key for hotel staff. Color: Black Material: Plastic Package Contents: 100 x Hotel RFID Key FOB Only the above package content; other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture to vary slightly from the real thing. Measurement may vary by +/- 1-3 cm.