Decode Error Rate less than 1/8 million Print Contrast Signal : greater than equal 30° Scan Angle: Yaw(Skew) 72° pitch 82° Voltage: 5V Current Operation: 780mA, Idle 255mA Presicion: greater than equal 4mil Depth of scan field: 0-270mm Decode speed: 200times/ second Light intensity: Daylight, 4000Lux Image Sensor -CMOS Port/Interface -USB (standard) Supported Symbologies PDF417,QRcode ,Date Matrix , Maxicode, Aztec Code , HanxinCode,MicroQR,Code39, FullASCⅡ,Codebar, Industrial2of5, Interleave2of5, Matrix2of5, Code93, Code128, Code32, EAN 128, MSI, EAN 8&13, UPCA&E, Plessey Colour:black Material:plastic Package Contents: 2 x QR Barcode Scanner 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 a little different from the real thing. The measurement allowed error is +/- 1-3cm.