Key features: Frequency available with 125khz 3.3v ~ 5v dc power supply, uart-ttl interface R/w or read-only uid of t5577 and its compatible cards; Available to set to read different page or block address with password; Optional output as wg26, wg34 or uart ttl External antenna, reading range up to 5~7cm External led&buz available( external driver circuit needed Technical parameters: Electrical specification Power supply dc 3.3v-5v Power consumption < 45ma Operation frequency 125khz Baudrate 9600~115200 bit/s ( default 9600bps) Interface uart ttl Antenna external, stamp-hole Reading range 50- 70mm (depends on tag and antenna size) Mechanical specifications Dimension 25mmx16.5mmx2.8mm (lxwxh) Weight 3g Material fr-4, blue Model chk102mt Environmental conditions Operation temperature -20 +80 degree Storage temperature -40 +85 degree Humidity relative humidity 595% Supported standard/ tags T5567,T5577 and compatible cards Sdk information Demo software windows, c# program language Files comprotocol document User manual Demo.Exe