1、The two-dimensional scanning platform used on desktop computers can scan barcodes and QR codes on paper and screens. 2、Barcode devices provide accurate, easy-to-use and fast data entry solutions for computer systems. 3、No need to install any software and drivers, just connect to the computer via a USB cable, plug and play. 4、No need to pick up the scanner when scanning, easy to use, can improve work efficiency and save time. 5、Mainly used to scan mobile payment codes instead of scanning ordinary product codes. 1 x Barcode Scanner1 x User Manual  Item Type: Barcode ScannerPerformance: Image Sensor: 640 x 480 CMOSLight Source: White light LED650nm±10%Symbol: 2D: QR code, PDF417, DataMatrix, HAN-XIN codeCODE128, EAN8, EAN13, UPCE, UPCA, CODE39, CODABAR,1D: CODE93, ITF25, MATRIX25, CHNPOST25, INDUSTRIALAL25, COOP25, STANDARD25, PLESSEY, MSIPLESSEY, CODE11Resolution: ≥ 5 millionDepth of Field: QR: Approx. 36 x 36mm / 1.4 x 1.4inCode: Approx. 10 ~ 190mm / 0.4 ~ 7.5inReading Angle: Horizontal: 50°Machinery & Electronics: Interface: Keyboard, RS-232, USB (HID or V-COM), PS/2Working Voltage: 5VDC±10%Current at 5VDCWorking: 127.5mAStandby: 82.5mASize: LWH: Approx. 88 x 88 x 82.5mm / 3.5 x 3.5 x 3.2inEnvironmental Aspects: Working Temperature: -20℃-+50℃Storage Temperature: -20℃-+70℃Humidity: 5%-93% (no condensation)Ambient Light: 0～100,000 lx (natural light)ESD: ±9KV (contact discharge); ±15KV (air discharge)How to Use: Reading Skills: 1. In order to obtain a good reading effect, the aiming beam projected by the viewfinder should be aimed at the center of the barcode, but it can be aimed in any direction for reading. 2. Aim the scanning gun at the bar code and press the trigger so that the aiming beam is in the middle of the bar code. 3. The closer the scanning gun is to the barcode, the smaller the aiming beam; the farther the scanning gun is from the barcode, the larger the aiming beam. If the barcode is small, the scanner should be close to the barcode; if the barcode is large, the scanner should be farther away from the barcode, so that it is easier to read the barcode correctly. 4. If the bar code is highly reflective (for example, coated), it may be necessary to tilt the scanner at a certain angle to successfully scan the bar code.