Description: Type: Copy\/Duplicate RFID ID Card Copier Writer To Smart Ring, Make Your Life be More Convenient Support ID Card Type: 125KHz, 250KHz, 375KHz, 500KHz Battery Power Supply : 2 x 1.5V AAA Battery Standalone Operation, No Need to Connect With Computer \/ PC Built-in Individual LED Lights and Buzzer Indicator. Built-in Transceiver Antenna Dimension: 105 * 40 * 15mm(L * W * H) Weight: 61.2g Package Includes: 1 x ID Card Reader (Including the Instructions) Notice: The Card Reader Only Support ID Card Please take the website instruction as standard, some error with the written statement. (Without Battery) Notice: 1.Due to the difference between different monitors, the picture may not reflect the actual color of the item. Please consider this before the purchase. 2.Please allow slight deviation for the measurement data.