The Opticon OPN2003 is one of Opticon's smallest barcode scanners, measuring just 1.26"x2.44", and weighing only an ounce with its battery. Designed for mobility, this pocket memory scanner makes barcode data collection simple. It can be worn around the neck as a lanyard making data collection fast with Opticon's 100 scan per second laser. Using the OPN2003 is straightforward with its two button function. Scan a barcode with the large button and it will be stored automatically. If you make a mistake, the smaller button allows you to re-scan the barcode in order to remove the item from the memory. It features 512kB flashROM/256kB RAM memory, enough to accommodate over 10,000 scans with timestamps.