Easy installation & ABS material. 12 rear view with is brigter and clearer at night. Horizontal Resolution: 1000 TV lines. Sound Frequency: 1.6-2.0m: 0.5HZ (slow); 1.1-1.5m: 1 HZ (slow); 0.6-1.0m: 3 HZ (); 0-0.4m: sounding.
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