The device allows you to select the number of Infra red LEDs. 19 is the top bank and 21 in the bottom bank. It's designed to allow you to have better black and white images in total darkness by using the 40 LEDs top and bottom combined. In better light conditions just use the 19 which saves battery juice.
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The device allows you to select the number of Infra red LEDs. 19 is the top bank and 21 in the bottom bank. It's designed to allow you to have better black and white images in total darkness by using the 40 LEDs top and bottom combined. In better light conditions just use the 19 which saves battery juice.