GM60 is a QR code scanner with high integration and excellent performance; It is small in size; The barcode and QR code formats that can be recognized include QR Code, Data , PDF417, EAN13, UPC, Code 39, Code 93, Code 128, UCC/ 128 et al. Stainless steel threaded housing simplifies installation troubles. Neon color effects can be set freely. Color: silver Material: stainless steel + plastic SPECIFICATION Model: GM60 Type: Barcode Scanner Decoding Ability: QR Code, Data , PDF417,EAN13,UPC,Code 39,Code 93,Code 128,UCC/ 128 Scan Mode: 640 x 480 Interface: UART Resolution: 5mil Serial Baud Rate(UART): 57600 Operating Voltage: 3.3V Operating Current: 70mA Contrast: 25% Weight: 25g/pcs Size: External Diameter 28mm Internal Diameter 25mm Height 15mm Thread M25 Scan Angle: Roll 360, Pitch 55, Yaw 55 Viewing Angle: 69(Inclination), 56(Elevation) Light: Colorful indicator/green light flashing prompt reading success Operating Temperature: -30 degrees to 70 degrees Storage Temperature: -30 degrees to 85 degrees Temperature Humidity: 5% to 95% Relative humidity, Non-condensing You can dowload GM60 user manual from the following website: https://.dropbox.com//buysgr2aeutuub3/AADsvupiGseFm-6IowMBWGCOa?dl=0 Package Contents: 10 x Barcode Scanner 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.