This unit can be used for N Scale and HO Scale. The speed unit can be switched between kilometers and miles. The speed is automatically displayed after the vehicle passes. Unit gets power from USB and a USB-A to Mini-B is included with your speedometer. User will need to provide own power source (computer, wall plug, usb battery pack, etc.)
Full Manual: http://drm.com.tw/wp-content/uploads/2020/08/SPC100V200_english.pdf



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