This is a TOF-based (time of flight) mini laser ranging sensor with embedded MCU and ranging algorithm, which the measuring range is up to 7.8m and the accuracy is up to 4cm. It supports UART or I2C communication bus, features longer measuring distance and higher light interference tolerance capability due to its ultra narrow FOV, suitable for either indoor or outdoor condition. And its ambient light tolerance is up to 100K LUX. This sensor can be widely used in applications like common distance measuring, robot obstacle avoidance / route planning, as well as drone altitude setting / ceiling detection, and more... Cost Effective Solution:0.02 - 7.8m Long Range Low Cost Ranging Module,High Stability, High Accuracy, High Sensitivity Ranging TYPICAL MEASURING RANGE:0.02m -7.8m WAVELENGTH:940nm FIELD OF VIEW (FOV):2-3 COMMUNICATION INTERFACE: Default: UART (3.3V TTL signal level) 12C(cascading support, the slave address is 0x08+module ID) complementary 1/O level output (distance parameter is in ths mode) BAUDRATE: UART: 4.8Kbps-3000Kbps (921.6Kbps by default) 12C: up to 400Kbps POWER SUPPLY:4.3-5.2V Colour:As Shown Material:PC Package Contents: 1 x TOF Time of Flight Laser Range Sensor (Due to different product batches, the appearance , which does not affect the use) Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.