Key features of the switel bcf 820 automatic display save energy mode brightness control volume control li ion acumulator 37 v 1200 mah night light in baby unit infrared diodes for night vision voice operated exchange vertically pivoted camera transmission range 300m mains or accu power operation the switel bcf 820 baby monitor from switel is one of the finest cordless audio visual surveillance baby monitors available with a good sized 24 tft display screen you will not have to strain