GM861S Reading Distance:5-30cm Contrast x :Greater than 25% Scan Angle x x :Roll:360°Pitch:65°Yaw:65° Viewing Angle:67°(Horizontal)53°(Vertical) Parameter Performance Sensor CMOS Scan Mode 640 x 480 Indicator Light Green lightas read successfully Read Code Type 1D: EAN-13, EAN-8, UPC-A, UPC-EISSN, ISBN, CodaBar,Code 128, Code93, ITF-14, ITF-6, Interleaved 2 of 5,Industrial2of5, Matrix2of5, Code 39,Code11, MSI-Plessey, GS1 Composite,GS1-Databar (RSS) 2D: QRCode, DataMatrix, PDF417 Accuracy of reading x: ≥10mil Mechanical/electrical Parameters: Parameter: Performance Interface: TTL-232/USB Size(mm): Diameter 20.9mm Height 6.2mm Weight: 2g/pcs Prompting mode: LED Indicator OperatingVoltage: 3.3V Operation Current: 70mA(Max) Standby Current: ≤6mA(Typical) Startup time: ≤250mS (Typical) material: metal Color as shown Package Contents: 4 x Scan code module 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.