Acu-Rite 00526W Wireless Outdoor Thermometer Displays outdoor temperature, -40 F to 158 F (40 C to 70 C) Displays indoor temperature, 32 F to 122 F (0 C to 50 C) Features programmable temperature alarm Wireless range: to 150 ft (50 m), depending on home construction materials Requires 4 AA batteries (not included); ROHS compliant