Air vent design provides head protection and ventilation High quality temperature and humidity sensor for accurate readings - Indoor temperature range: -9.9 to 60 C (14.18 to 140 F) - Indoor humidity range: 10% to 99% RH - Outdoor temperature range: -40 to 60 C (-40 to 140 F) - Temperature accuracy: ±1 C (±1.8 F) - Humidity accuracy: ±5% RH - A reliable helper for temperature and humidity measurement Two-channel thermometer with three location display - Thermometer supports 2 outdoor sensors, showing temperature for the host and two sensors on one screen - Indoor unit also displays humidity - Each receiver and transmitter uses 2 x AAA batteries (not included; to open the battery cover of the transmitter, pull up) - The digital thermometer can display temperature conditions of three different places within a radius of 100 metres from the host at the same time Versatile and easy to use - Hygrometer can switch between C and F and supports MAX/MIN display - MAX/MIN values can be viewed within 24 hours - Low battery indicator reminds you when power is running low Two-button operation for simplicity - RF/ C/ F button: short press to switch units, long press to restart signal reception - MEM button: displays MAX/MIN values within 24 hours - Long press on MEM to delete max/min data Flexible mounting options - Host includes a stand/frame and hanging holes - Stand frame rotates 128 degrees for flexible placement - Transmitter can be placed upright or mounted on a wall via the hanging hole - Suitable for bedrooms, wine cellars, offices and more locations