Efficiently measure just about anything with the PARA Versatile Pythagorean Laser Measurer. Utilizing two lasers and an angle encoder, this useful gadget allows you to make measurements without even moving. PARA works by measuring the distance between two laser points. You can also attach the measurer to a tripod for more precision, eliminating the need for a ladder. Similarly, the roller function makes it easy to measures curves by dragging the device. To use PARA, start by holding it in your hand. Then point the two lasers to your target and press the trigger. Likewise, you can put PARA on the desired surface and use the wheel to drag it until you reach your goal. Once you measure the length using the Laser or Wheel mode, the data automatically transfers to your smartphone via Bluetooth. Simply press save to keep track of your measurements.