RAR213HG Weather@ Home Thermo Monitor Indoor/ Outdoor Weather Thermo-hygro Monitor station with Bluetooth connectivity The RAR213HG wireless weather station displays in/outdoor temperature & humidity on the main unit & on your smart phone. With a Bluetooth transmission range of up to 50m you can view all the important information anywhere else in your home. Using the optional sensor (BTHGN129) the RAR213HG shows 7 day weather history & daily Hi/ Lo temperatures. The RAR213HG weather station features the next generation Bluetooth 4.0. The addition of Bluetooth means that you can monitor the weather station using the Smart Phone App. The App shows you the current weather from the comfort of your Smart Phone. Please note: RAR213HG can be paired with 3 x THGN132N. Currently you may only pair up to 3 sensors (locations). In order to use the remaining 4th & 5th channel customers need to purchase BTHGN129 which is due back in stock later this year (2014).