GM875 Bar code reader module is a high performance scanner, can read 1D bar code easily and read 2D bar code with high speed.It also high scan speed for linear code, even for bar code on paper or screen.GM875 bar code reader module is an advanced bar code decoding algorithm which developed on image recognition algorithm, can easily and accurately read bar code, simplify secondary development.GM875 works stable in dark and temperature range.(1) High-precision small code reading (1D:3mil, 2D:5mil)(2) high speed reading(3) High-contrast reading ( equal 15%)(4) High motion tolerance performanceSensor:CMOSPixel:640x480Lighting:White Light(3000K)Collimation:Green Light(527nm)Read Code Type:2D: QR Code, Data , PDF417, Micro-PDF417, Micro-QR, ,etc1D: -13, -8, -A, - ISSN, , CodaBar, Code 128, Code93, ITF-14, ITF-6, Interleaved 2 of 5, Industrial 2 of 5, 2 of 5, GS1 Databar(RSS), Code 39,Code 11, -Plessey, etc.Accuracy of reading:1D:3MIL(Code39,CODE128,EAN13),2D:5MIL(QR,,PDF417)Viewing Angle:Horizontal 42,Vertical 32Contrast: equal 15%Depth of Field:30 - 320mmBar code sensitivity:Pitch 60,Tilt 360,Skew 60Interface:TTL-232,USBPrompting mode:LEDOperating Voltage:3.3VCurrent Operating Current:250mA(Max)Rated power consumption:less than equal 850mW(Max)Standby Current:less than equal 20mA(Typical)Startup time:less than equal 250mS (Typical)Test conditions:environment temperature = 23; environment illumination = 300 ; Test distance = (minimum depth of field + maximum depth of field); environment temperature = 23; environment illumination = 300 Colour:BlackMaterial:PlasticSize:21.8x8.8x6.8mmPackage Contents:1 * Barcode Scanner1 * cableOnly 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.