People are saying that my primary O2 is a wideband, what's the voltage range that they usually go for. 1-5 volts???

I've been reading through the Honda Technician Bible and I've seen bits here and there that it should read above 1 volt for this or that, but nothing too clear. The voltage range for the secondary it talks about, which is your typical 0.XXX to a little over 0.600, but its blank for the primary. Just bits here and there in the trouble shooting about 0.8 volts to over 1.0 at idle...

I want to know since I'm building an A/F meter and the input range is input, plus this is an excellent piece for some tuning...