The PRO-2 Handheld Programmer is a simple device that can be used to update the firmware in an Apex, Trilogy, and Curve bill acceptor. The updating process takes little time to setup and even less time in the field to update your bill acceptor. The Pro-2 also allows an unlimited amount of updates. To use this device you will connect it to a PC and load it with the appropriate firmware file, then just remove the PRO-2 from your PC. You then can easily update a bill acceptor on location using only the PRO-2, no computer necessary.