Measuring Frequency: 5HZ,10HZ,20HZ(Adjustable); Measurable velocity of moving objects:less 2m/s ADDR Device Address. Postion is 1, count from the top , when item is 0, count from ( 04 08 01 F9),The default setting is from end check , it sums all the bytes in front,Returns the reverse, plus 1, in the data returned by single measurements and successive measurements, in which the quotes are part of the data,Format is ASCII sample:123.456 m display 31 32 33 2E 34 35 36 ADDR Default value 80(128) NOTICE: If you need to get a higher frequency, you need to sacrifice the accuracy of the measurement. When set to 20hz (send 04 0A 14 E4), the accuracy in continuous measurement mode will become +-4mm; if the frequency is set to the lowest frequency (send ) 04 0A 00 F8), the accuracy in continuous measurement mode will be within 1mm. In single measurement mode (send 80 06 02 78), the accuracy is always within 1 mm. Remarks: Because the environment light intensity is too , the ambient temperature is too high or too low, the reflector is too weak or too strong, or the target of a rough surface, different measurement objectives and measurement environment may cause some error of the measurement range or measurement results. Parameters:Power Supply Voltage:DC3V-3.3V Current:100mA Measuring Range:0.01-80m Measurement Accuracy(standard deviation):1.mm Distance Unit:m Laser Type:620-690nm Laser Class:class II Baud rate:9600bps data bit:8 bit Start bit:1bit Stop Bit:1bit Parity:none The to read data when the parameter is factory setting:Single measurement:80 06 02 78 Continuous measurement:80 06 03 77 Shutdown device: 80 04 02 7A Set address: 04 01 80 81 Distance modification: 04 06 2D 01 -1 04 06 2B 01 D0 +1time interval (1S): 04 05 01 Set start point: 04 08 01 F9 Top 04 08 00 back ends Set range: 04 09 05 F4 5m 04 09 0A EF 10m 04 09 1E DB 30m 04 09 32 C7 50m 04 09 50 A9 80m Set frequency: 04 0A 00 F8 04 0A 05 F3 5 04 0A 0A EE 10 04 0A 14 E4 20 Set resolution: 04 0C 01 F5 1mm 04 0C 02 F4 0.1mm Set start the measurement when power on: 04 0D 00 F5 turn off 04 0D 01 F4 turn on Single measurement (broadcast) 06 06 Read cache: 80 06 07 73 Control laser: 80 06 05 01 74 open 80 06 05 00 75 Close Colour:Black Material:Plastic Package Contents: 1 * module 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.