mine was pretty consistent, pretty close to actual TL measure, i could hold about the same on there as i could the TL, ~150-151 on music, a few times i saw it 152 but ill let that one slide
i actually took it out when i put the double din in, it was a little dinged up when i bout it, bought it pretty cheap though just to play with it, but i ended up leaving it in there for good for SPL meter and volt meter, does a decent enough job for the money
i need to sell it since i dont have any use of it now, i you want one just to mess with it works perfect, ill sell it cheap pm me