Handheld shape design, comfortable hand feel and high quality. Two buttons for simple operations. Standalone operation, no need to connect to computer or PC, easy to use. Built-in individual LED lights and buzzer indicator. Reading distance is 0 - 6 cm. Copies 125KHz RFID cards. Compatible with T5577, CEM5200, EM4305 and EM4305. Read: EM / TK (EM4100, TK4100, etc.) cards or keys. Write: EM4305, CEM5557, T5577, 5200, EM4205, etc. cards or keys. (Note: does not support HID.) Built-in individual LED lights and buzzer indicator, receiver antenna. Power supply: 3V (2 x AAA battery, not included). Read/Write cycles: Greater than 20,000 times. Dimensions: 115 x 70 x 30 mm. Weight: 85g. Color: As shown. Material: Plastic. Package contents: 1 x RFID Copier 5 x Keyfob Tags 5 x Cards 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 to be slightly different from the real thing. Measurement allowed error is +/- 1-3 cm.