Description This LCD digital wireless thermometer is made of premium material for durable and long-lasting use. It's very convenient to show the indoor and outdoor temperature. Thie wireless transmission function can allows you to know the outside temperature with internal receiver. Features - Color: Black. - Material: ABS. - With LCD Digital Wireless Thermometer. - for durable and long-lasting use. - Lightweight for portable carry. - Show the indoor and outdoor temperature. - Wireless transmission function allows you to know the outside temperature with internal receiver. - Very convenient, a great item for your home or office. Specification - Size: Transmitter Size: 2.60x1.97x0.79 "/ 6.6x5x2cm .            Receiver Size: 3.15x2.17x0.67 " / 8x5.5x1.7cm. - Internal temperature measurement: 0 ~ 60 ° C. - Outside temperature measurement: -40 ~ 60 ° C. - Accuracy: (+/-) 1 ° C. - Wireless transmission (outdoor): 100 meters, 30 meters under most state. - Frequency: 433 MHz. - Refresh Rate: 60 seconds. - Transmitter Battery: 2 x 1.5V AAA batteries (not included). - Receiver Battery: 2 x 1.5V AAA batteries (not included).Packing list: 1x receiver 1 x Transmitter 1 x User Manual (English)