Specifications Hign-concerned Chemical:None Model Number:IDW01 Origin:Mainland China Certification:None Times:Read / Write > 20000 times Write:EM4305 CET5557 T5577 5200 EM4205 card / Key Read:EM4100 TK4100 etc Card / Key Frequency:125Khz Power Supply:3V (2 x AAA battery) Item:125KHz Duplicator Copier Writer IDW01 Reader Duplicator 125khz Handheld shape design, comfortable hand feeling and high quality. 2 buttons for simple operations. Standalone operation, no need to connect with computer / PC, easy to use. Built-in individual LED lights and buzzer indicator. Reading distance is 0 - 6cm. Can only copy 125KHz card, Compatible with T5577, CET5200, EM4305 and EN4305. Parameter Read: EM / TK (EM4100 TK4100 etc) cards or keys Write: EM4305 CET5557 T5577 5200 EM4205 etc cards or Keys Built-in: individual LED lights and buzzer indicator, transceiver antenna Power Supply: 3V (2 x AAA battery) Times: Read / Write > 20000 times Size: ( L*W*H ): 115 x 70 x 30mm Weight: 85g How to use Read: Put the inductive proximity card (EM4100 or TK4100 or has inside info EM4305 or T5577) in the induction area and hold the read key (left one). The buzzer will sound emitted by the green indicator for success. If the power light is only blinking, then the card reader failed. Copy: After the reading is successful, put the blank card in the induction area and hold the copy key(right one). The buzzer sound emitted by the yellow indicator for success. If the power light is only blinking, then the card reader failed.