Model : AL-920 Specifications:  Counting Speed : 1000PCS/MIN (MDCSDC MODE) 1200PCS/MIN (CTN MODE) Hopper Capacity : 400-500PCS Stacker Capacity : 200PCS Detection Technology : UV Light Magnetic Detection IR Light Detection Power Supply : AC 100-240V Power Consumption : 50W Interface : USB RS-232 RJ-11 Product Size : 350x320.50x300.50MM Weight : 7.5KG 3 Months free Software Update Additional Features : Built-in Display Dual USB Ports Auto Start-Stop Currency Customization 3 Modes of Operation Please update according to the following operation steps thank you! 1. Download the upgrade file to your U disk directory 2. Power off the validator 3. Insert the U disk with the upgrade file into the USB port on the back of the currency detector 4. Turn on the power the banknote detector will automatically upgrade 5. After waiting for the upgrade to complete turn off the power again then power on again the upgrade is complete Note: The file I sent you is an APPU file. If you download it and it becomes a ZIP file please unzip the file and put it in the USB drive directly in the USB drive directory not in a folder. Please use a good quality USB drive SankDisk is recommended.