BTT-2880 Digital Belt Tension Meter Tester Belt Tension Gauge BTT2880 (BTT-2880) This Belt Tension Tester used the exclusive Micro-computer LSI circuit and crystal time base to of It can be used to measure and adjust the tension of timing and auxiliary belts fitted to motor vehi Tension can be displayed in a variety of standard and manufacturers' units. Use USB data output and RS-232 data output to connect with PC.