Description : Cash drawer trigger is designed to provide USB interfacing to the cash drawer. This allows the cash drawer, which is previously connected to POS printer or cash register, to be directly connected to a USB port of the computer. This means through the USB Trigger the cash drawer can be directly connected to the computer when this no printer used in the POS system. The USB trigger module uses a virtual serial port driver, making it appear to software like a standard RS232 serial port. This way existing POS software can communicate with the USB cash drawer trigger as though connected to a serial port. A unique serial number is assigned to each USB trigger module and driver software will assign the next available serial port to each device it recognizes(multiple triggers can be used on one computer). Cash drawer can be directly connected to the computer with it. Powered by USB bus, external power is not required Allows for "Hot Plugging", plug and play connectivity No need to set the COM property Suitable to any cash drawer command. Package includes : 1 x Cash Drawer Trigger Dear buyers, we appreciate your business, if you are satisfied with our service, please leave us a positive feedback and rate the details of the transaction (Detailed Seller Ratings) with a "PERFECT 5 STARS". If you have any problems, broken, quality problems, please don't worry, and don't leave bad feedback. Please send us an email first, we will reply you as soon as possible, please allow us to respond within 12 hours. We understand your mood, and will provide you with the best solution for your problem, please give us the opportunity to solve the problem, For any case,please feel free to come to us,we are always here. look forward to and thank you for your trust.