【100m Long Distance Transmission】: Indoor thermometer With the handheld transmitter, you can measure the outside temperature of the sensor and transmit it within 100m without obstacle. 【12/24 hours, ℃ / ℉ switchable】: Wireless for indoor outdoor thermometer, 12H/24H format, temperature unit ℃/unit for selection. Can be placed on the table or hung on the wall. 【Wireless Technology】: Indoor and outdoor thermometers use wireless technology, you can find out the outside temperature in the indoor receiver. < p> 【Indoor and outdoor temperature comparison】: Record the maximum indoor and outdoor temperature and display the indoor/outdoor temperature at the same time. [Back bracket design]: Outdoor connected indoor thermometer. Can be placed on the table or hung on the wall. Function: Clock function, indoor temperature, outdoor temperature, storage of minimum/maximum temperature values. Size: Main unit: 150 x 86 x 20, sub-unit: 130 x 40 x 21 Temperature function: Ø indoor temperature detection