Colour: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 a little different from the real thing. The measurement allowed error is +/- 1-3cm. Used mostly by hospitality industry as a Master Key for Hotel Staff Compatible and works only with for MIWA, for ILCO, for SECURELOX, for DELUNS, 13.56 Frequency locks and Not upgraded older version of ,SAFLOK, ONITY locks. also works with and PN532 . *NOT COMPATIBLE*and does not work with NEWLY UPGRADED /SAFLOK/ONITY LOCKS, ULC or Ultralight Systems, Vingcard, Beline, Salto, Orbita, Suretech, Acculock, Betech locks 100% New based company with Guranteed Customer Satisfaction. Total 100 Pcs Round RFID Key FOB, Can be Re-Writable Multiple times Works only on 13.56 mhz frequency , does not work on 125 khz frequency