Features:-100% brand new， high quality.-Indoor / Wireless outdoor temperature (°F or °C).-Synchronized instant reception.-Minimum or Maximum reset.-Flip out desk stand or wall mounted.-Durable，precise，convenient.Specification:-Color: white-Indoor Temperature range: -20°C~60°C.-Outdoor temperature range : -40°C to +65°C (-40°F to 149°F )-Temperature accuracy: ±1°C.-Transmission frequency : 433MHz.-Transmission range: Up to 50 meters (150 feet) in open areaPower consumption:-Receiver: 2 x AAA LR3 alkaline batteries (Not included)-Sensor: 2 x AAA LR3 alkaline batteries (Not included)-Size(receiver): 7.5cm(L)x 6cm(W) x 2cm(H){ about 3'' x 2.4'' x 0.8''}-Size(sensor): 6.5cm(L) x 4.8cm(W) x 2.8cm(H) { about 2.5'' x 1.9'' x 1.1''}Notes:1. First install the indoor thermometer battery，battey for the outdoor snesor also MUST BE INSTALLED In 60 seconds， then they are the same code.2. Place the outdoor sensor less than 50M between indoor receiver3. The outdoor sensor sends singnal to the indoor receiver every minutes4. Don't change the place of outdoor sensor frequently5. Please use carbon batteries.Package Included:1 x LCD thermometer1 x Remote Sensor1 x Instruction Manual