> For the complete documentation index, see [llms.txt](https://docs.revrobotics.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.revrobotics.com/rev-crossover-products/sensors/2m-distance.md). # 2m Distance Sensor The REV Robotics 2m Distance Sensor ([REV-31-1505](https://www.revrobotics.com/rev-31-1505/)) uses the ST Microelectronics VL53L0X Time-of-Flight (ToF) laser-ranging module to measure distances up to 2m with millimeter resolution.
Unlike other ranging sensors that rely on the intensity of reflected light, this sensor can measure how long it takes for the light to bounce back, the “time of flight.” This results in much more accurate measurements that are independent of the target’s reflectance. ### Kit Contents | Part Number | Description | Qty | | :--------------------------------------------------------------------------: | -------------------------------- | :-: | | [REV-31-1505](https://www.revrobotics.com/rev-31-1505/) | 2m Distance Sensor | 1 | | [REV-31-1407](https://www.revrobotics.com/jst-ph-4-pin-sensor-cable-4-pack/) | JST PH 4-pin Sensor Cable - 30cm | 1 |