BT-100U cash drawer trigger is designed for USB interfacing to the cash drawer. This allows the cash drawer, previously connected to a printer or cash register, to be directly connected to a USB port on the computer. With the USB trigger, the cash drawer can be directly connected to the computer when no printer is used in the system.The BT-100U USB trigger module uses a virtual serial port driver, making it appear to software as a standard RS232 serial port. This enables existing software to communicate with the USB cash drawer trigger as if it were connected to a serial port. A unique serial number is assigned to each USB trigger module, and the driver software assigns an available serial port to each recognized device. Multiple triggers can be used on one computer.- Cash drawer can be directly connected to the computer with BT-100U - Powered by USB bus; no external power required - Supports hot plugging and plug-and-play connectivity - No configuration settings required - Compatible with most cash drawers - Color: black - Material: plastic Package Contents: 1 x BT-100U Cash Drawer Trigger Note: Light and display differences may cause slight variations in color between the image and the actual item. Measurement error is +/- 1-3 cm.