Memorial day is 05/25/2015 – Orders will ship out on May 26th. There will not be any deliveries or shipping on Monday. Any order placed after 11am ET on Friday May 22nd will not start to ship out until Tuesday May 26th.
The PN532 is only capable of reading 13.56MHz tags, mostly ISO14443A which includes Mifare (though this is about 98% of the tags used in the real world anyway). I think the small glass capsules are all in the 125 - 134 kHz range