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Highlight Hpc005 Infrared People Counter (including 2 Pairs Of Tx-rx And 1pc Data Receiver) - Counters - AliExpress
Amazon.com: People Counter with Display - Bi-Directional - Completely Wireless & Battery Operated - Easy to Use - Accurate Visitor Counter for Retail and Other Applications : Industrial & Scientific
Parametric Outdoor Radar People Counter - myDevices