Features* This Belt Tension Tester used the exclusive Micro-computer LSI circuit and crystal time base to offer high accuracy measurement.* It can be used to measure and adjust the tension of timing and auxiliary belts fitted to motor vehicles and other machines. * Tension can be displayed in a variety of standard and manufacturers' units.* Tension limits can be set into the instrument, either manually or automatically. During belt tension measurement and adjustment, the belt tension is displayed. A visual and audible indication of whether the tension is within or outside the set limits is also given. This avoids the user having to read the display whilst adjusting the belt.* The selected tension limits, measurement units and calibration parameters are stored in The memory of the tester, and will be remembered even when the instrument is switched off and the batteries removed.SpecificationMeasuring range: 0-750N / 0-120lb / 0-77Kg / 0-114SeemsAccuracy: ≤±5%Belt state indication: Low, OK, HiResolution: ±1N (or1 least significant digit of other units)Belt width: ≤36mmOverload alarm: 750NMax. load: 850NMetric/ImperialAuto power offPc interface: RS-232CPower supply: 4×1.5V AAA(UM-4)Operating condition: 0 ~ 50ºC, <85% RHDimension: 135×62×33mm (5.3×2.4×1.3inch)Net weight: 335g(not including batteries)Standard Accessories:1. Main Unit2. Measuring Head3. Carrying Case4. Operation ManualOptional Accessories:(Not included in this listing)1. USB, RS-232C data cable with software2. Bluetooth data out put with software