1. Quickly identify the one-dimensional code and two-dimensional code on the screen 2. No plug-in required, fast invoicing 3. Anti-slip and drop-resistant design 4. Large reading window 5. Integrated design of body and data cable. Compatible with multiple systems Pixel: 640 x 480CMOS Advantages: Scan mobile phones / tablets / Alipay / WeChat / paper barcodes Interface type: USB / RS232 / TTL Environment light intensity: 0-100000 Lux Lighting lamp: no lighting mode, reading bright mode, constant bright mode Code system: 1D: Code128, UCC/EAN-128, AIM-128, EAN-8, EAN-13, ISBN/ISSN, UPC-E, UPC-A, Interleaved 2 of 5, ITF-6, ITF- 14, Matrix 2 of 5,Industrial 25, Standard 25, Code 39, Codabar, Code 93, Code 11,Plessey, MSI-Plessey, GS1-DataBar (RSS), (RSS-14, RSS- Limited, RSS-Expand) 2D: PDF417, Data Matrix, QR, Micro-QR Reading accuracy: greater than equal 5mil Typical reading depth of field: QR CODE (30MIL), 0-15CM CODE 128 (10MIL), 0-12CM Barcode sensitivity: Tilt: +/-50degree@ 0degree Roll and 0degree Skew Rotation: +/-360degree@ 0degree Pitch and 0degree Skew Deflection: +/-60degree@ 0degree Roll and 0degree Pitch Lowest contrast: greater than equal 30% Prompt mode: buzzer, LED indicator Working voltage: 5VDC+/-5% Working current: 150mA+/-15mA Standby current: 80mA+/-2mA Maximum current: less than 200mA Environmental parameters: Working temperature: -20Celsius - +50Celsius Storage temperature: -40Celsius - +70Celsius Relative humidity: 5%-95% (no condensation) colour:White Material:ABS size:102 x 82 x 73mm Package Contents: 4 x bar code reader 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.