R-Zilla - Humidity Temperature Guage DialTime-tested analog design needs no batteries.Temperature readings from 60 to 120 F.Two easy mounting options.Affordable, accurate monitoring for a healthier reptile environment.An ideal choice for entry-level terrarium owners who want to monitor humidity and temperature, the two critical factors in reptile activity, disease resistance and breeding success. Traditional needle gauges display relative humidity from 0-100%, temperatures in a range from 60-120F (16-49C). The bright, easy-to-read dial mounts in seconds on the back wall of any terrarium, using the enclosed permanent double-sided tape or an included suction cup that can be removed for easy tank cleaning.5.25 in L x 1.00 in W x 8.50 in H - UPC: 96316680296