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.<br> 3. The Data Analysis Is Completely Stable And The Error Rate Is Low.<br> 4. The Low-Frequency Antenna Improves The Signal-To-Noise Ratio, The Recognition Speed Is Higher, And The Mobile Design Meets Various Needs.<br> 5. No Antenna Interface, No Need To Connect, Easy To Damage.<br> It Is Simple And Convenient To Cancel The Lithium Battery. (In Offline Mode, You Can Use The Power Bank)<br> Except That It Has Nothing To Do With The Original Relay, It Has Low Cost, Light Weight And Convenient portation.<br> Due to different batches, there may be differences in product appearance, color, and printed text, which will not affect the use.<br> Accessories random color and appearance,The color of the coil is random, No specification accepted<br> Color: Black<br> Material: PCB<br> Specifications: 5X T5577 Card<br> Package Contents:<br> 1 x RFID Card Reader Kit<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.