Only one of the grocery stores near me uses LCD price tags. There is a constant hiss/buzz from the power and I presume they aren't OLED because I can see the i

Only one of the grocery stores near me uses LCD price tags. There is a constant hiss/buzz from the power and I presume they aren't OLED because I can see the inconsistent backlight that goes out in places along the strip. Feels cheap and crappy overall.