3-1/2" window dial. Read outside temperature from inside. Compact dial with easy-to-apply suction cup mount. Large easy-to-read graphics. Temperature range -40 deg. F. to 120 deg. F. Weather-resistant and rustproof. No. 5321N: Scale: Fahrenheit, Temperature Rating: -40 To 120 Degrees F, Color: White w/Blue & Red, Height: 3-1/2", Width: 3-1/2", Depth: 1.5", Type: Dial, Material: Plastic, Pkg Qty: 1, Package Type: Card Thanks for shopping Hipp Hardware Plus's Online Store for all your DIY and Home Improvement needs. Remember Hipps Help!