This video shows multiple idChamp® NF4 RFID readers simultaneously connected to Android tablet (Galaxy S6 Lite) and reading NDEF data for the 1st stanza of the Star Spangled Banner while the Star Spangled Banner is sung by Whitney Houston.
All the stanzas of Star Spangled Banner were written to the tiny PCB based NFC NTAG213 tags (measure 4.5 x 4.5 x 1.8mm) using the NF4 reader/writers.
Demonstrates the power and flexibility of the NF4 that can provide multi-point attendance check-in using a single tablet or phone on Android, iOS, Windows 10, and MacOS.