1. Built-In High-Frequency Antenna, Corresponding To The Antenna Depth, Eliminates Blind Spots, And Reads The Entire Data Card Without Interruption.<br> 2. Increase The Frequency Of Keystrokes, The Size Of The Card Can Hold Everything. The Data Analysis Is Completely Stable And The Error Rate Is Low.<br> 3. The Low-Frequency Antenna Improves The Signal-To-Noise Ratio, The Recognition Speed Is Higher, And The Mobile Design Meets Various Needs.<br> 4. No Antenna Interface, No Need To Connect, Easy To Damage.<br> 5. It Is Simple And Convenient To Cancel The Lithium Battery. (In Offline Mode, You Can Use The Power Bank)<br> Material: PC+Metal<br> colour: black<br> Package Contents:<br> 1 x RFID Card Reader<br> Only the above package content, other products are not included.<br> Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.