O'D was the first Temp Gun i ever purchased! $35 back in 2007!!!! and got to use it for about a month. then the temp reading went waaaaaaay off. changed battery.... same thing happened! never got a +/_ 1 accurate reading! always compared with my biddy's temp gun, O'D was off about 40 something degrees! WTF is that???? swapped batteries... same thing! most expensive worthless thing I ever bought!