4. The Low-Frequency Antenna Improves The Signal-To-Noise Ratio, The Recognition Speed Is Higher, And The Mobile Design Meets Various Needs. 3. The Data Analysis Is Completely Stable And The Error Rate Is Low. 2. Increase The Frequency Of Keystrokes, The Size Of The Card Can Hold Everything. 1. Built-In High-Frequency Antenna, Corresponding To The Antenna Depth, Eliminates Blind Spots, And Reads The Entire Data Card Without Interruption. 5. No Antenna Interface, No Need To Connect, Easy To Damage., Weight: 0.3086471668 Pounds, Manufacturer: Tuidzljd