Kercan&reg; Handheld Wired USB 2d/qr Barcode Scanner CCD Bar Code Reader Automatical sensor , when barcode is close to, it will work automatically. Note: we suggest you buy reader stand from our store when in automatic working. CCD optical imaging scanning technology that is researched and developed independently can identify screen code, incomplete code and fuzzy code etc, Effectively compensate for the problem that laser scanner can not identify screen code. USB Cable(1.5M) and easy to installation, Scanner size: 170mm x 100mm x 75mm Multiple dacode ability, fast to scan Australian Post, Aztec, BPO, Canada Post, Codabar, Codablock, Code 11, Code 39, Code 93, Code 128/EAN128, DataMatrix, Dutch Post, EAN.UCC Composite, Interleaved 2 of 5, Japan Post, Matrix 2 of 5, MaxiCode, MicroPDF417, MSI Code, PDF417, Planet, Plessey Code, Postnet, QR code, RSS, Standard 2 of 5, Telepen, TLC 39, UPC/EAN. Package: 1 x 2D barcode Reader.