features of low cost and high performance, it is a great distance measuring tool for DIY enthusiasts.Features:Great distance measuring module with features of low cost high performance.Laser distance measuring sensor, easy for targeting.Work with power supply(not included) between 2.8V to 3.2V.Come with USB to TTL converter and download cable to connect with computer.Type 1 with distance speed measurement functions.Type 2 with distance, speed, angle and height measurement functions.Note:The module will be sent with random PCB color, please in kind prevail!The module defaults to stop measurement when power on.Input 0d0a4f4e0d0a: start to measure.Input 0d0a4f46460d0a: stop measuring.Input 0d0a4d4f44453d310d0a: switch to speed measurement mode.Input 0d0a4d4f44453d300d0a: switch to angle and height measurement mode.Input 0d0a4f3d310d0a: switch to single measurement mode.