buzz box United Kingdom

...Model No.: LSP-4092BD; Constitue: 1 control box, 4 sensors,1 LED monitor, a string of power lines; Function: A. Buzz indicator (buzzer built-in the display); (1)1.5m—0.8m: Bi,Bi,Bi; (2)0.8m—0.4m: Bi,Bi,BiBi (the closer, the faster); (3)0.4m—0.0m: BiBi…(continuous beeping); B. Visual indicator; (1)2.5m—0.3m: display the distance accurately; (2)0.3m—0.0m: display 00...

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