With clock function, support 12H / 24H time format, suitable for indoor and outdoor use. Digital thermometer, using wireless technology, can use receiver to receive measured temperature. / temperature unit for selection, supports onekey reading of the maximum and minimum temperature. Indoor temperature range is 050 (32122), and the outdoor temperature range is 2070 (4158). With a portable transmitter, it can sense outdoor temperature and transmit without obstacles within 100m. Specification: Condition: 100% Brand New Material: ABS Indoor Temperature Range: 0-50 (32-122) Outdoor Temperature Range: -20-70 (-4-158) Wireless Distance: 100m / 328.1ft (No obstacles and no distance) Temperature Accuracy: 1 Indoor Temperature Detection Cycle: 30 Seconds Outdoor Temperature Detection Cycle: 57 Seconds Time Display: 12/24 Hour System Indoor Receiver Working Power: 2 x 1.5V AAA Dry Battery (Battery Not Included) Outdoor Transmitter Working Power: 2 x 1.5V AA Dry Battery (Battery Not Included) Weight: Approx. 210g / 7.4oz Indoor Receiver Size: Approx. 149.8x85.8x21mm / 5.9x3.4x0.8in Outdoor Transmitter Size: Approx. 40x13x20mm / 1.6x0.5x0.8in Package List: 1 x Indoor Receiver (Battery Not Included) 1 x Outdoor Transmitter (Battery Not Included) 1 x Manual